Settlers founded a community here in 1842, later named afterDavid Hill, an Oregon politician. Transportation by riverboat on theTualatin River was part of Hillsboro's settler economy. A railroad reached the area in the early 1870s and aninterurban electric railway about four decades later. These railways, as well as highways, aided the slow growth of the city to about 2,000 people by 1910 and about 5,000 by 1950, before the arrival of high-tech companies in the 1980s.
Hillsboro has acouncil-manager government consisting of a city manager and a city council headed by a mayor. In addition to the high-tech industry, other sectors important to Hillsboro's economy are health care, retail sales, and agriculture, including grapes andwineries. The city operates more than twenty parks and the mixed-useHillsboro Stadium, and ten sites in the city are listed on theNational Register of Historic Places (NRHP). Modes of transportation include private vehicles, public buses andlight rail, and aircraft at theHillsboro Airport. The city is home toPacific University's Health Professions Campus.
The European-American community was founded by David Hill, Isaiah Kelsey, and Richard Williams, who arrived in the Tualatin Valley in 1841, followed by six more pioneers in 1842.[8] The locality went by two other names—East Tualatin Plains and Columbia—before it was named "Hillsborough" in February 1850 in honor of Hill, when he sold part of his land claim to the county.[9] On February 5, 1850, commissioners chosen by theterritorial legislature selected the community to be the seat of the county government.[9] Hill was to be paid $200 for his land after plots had been sold for the town site,[9] but he died before this occurred, and his widow Lucinda received the funds.[10] The town's name was later simplified to Hillsboro. A log cabin was built in 1853 to serve as the community's first school, which opened in October 1854.[11] Riverboats provided transportation to Hillsboro as early as 1867 when the side-wheel steamerYamhill worked on the Tualatin River.[8]
In 1871, theOregon and California Railroad line was extended to the area, but it ran just south of town because the city did not want to give the railroad land in exchange for the rail connection.[8] Hillsboro was incorporated as the Town of Hillsboro on October 19, 1876, by theOregon Legislature.[12] The first mayor was A. Luelling, who took office on December 8, 1876, and served a one-year term.[13] Notable later mayors included CongressmanThomas H. Tongue (1882 and 1886) and state senatorWilliam D. Hare (1885).[13] In 1923, the city altered its charter and adopted a council-manager government with a six-person city council, a part-time mayor who determined major policies, and a city manager who ran day-to-day operations.[14]
On September 30, 1908, 5,000 people gathered as theOregon Electric Railway opened a connection between the city andPortland with aninterurban electric rail line, the first to reach the community.[15] In January 1914, the Southern Pacific Railroad introduced its own interurban service, known as theRed Electric, on a separate line and serving different communities between Hillsboro and Portland.[16][17] SP discontinued its Hillsboro service on July 28, 1929,[17] while the Oregon Electric Railway's passenger service to Hillsboro lasted until July 1932.[16]
A brick building was constructed in 1852 to house the county government, followed by a brick courthouse in 1873.[18] In 1891, the courthouse was remodeled and a clock tower was added,[19] and the building was expanded with an annex in 1912. Anew courthouse replaced the brick structure in 1928. The last major remodel of the 1928 structure occurred in 1972, when the Justice Services Building was built and incorporated into the existing building.[18]
The city's first fire department was ahook and ladder company organized in 1880 by the board of trustees (now city council).[20] A drinking water and electricity distribution system added in 1892–93 gave the town three fire hydrants and minimal street lighting.[21] Hillsboro built its first sewer system in 1911, but sewage treatment was not added until 1936.[22] In 1913, the city built its ownwater system,[23] and the first library,Carnegie City Library, opened in December 1914.[24] From 1921 to 1952, the world'ssecond-tallest radio tower stood on the south side of the city,[25] but in 1952, the wireless telegraph tower was demolished. During the 1950s and 1960s, the privately owned companyTualatin Valley Buses, Inc., provided transit service connecting Hillsboro with Beaverton and Portland.[26] It was taken over by the publicly owned transit agencyTriMet in 1970.[27][28]
In 1972, the Hillsboro City Council passed aGreen River ordinance banningdoor-to-door solicitation, but it was ruled unconstitutional by theOregon Supreme Court in a 1988 decision.[29] The court determined that the city ordinance was overly broad, in a case that was seen as a test case for many similar laws in the state.[29] In 1979,Intel opened its first facility in Aloha, Oregon.[30] The Aloha campus was followed by the Hawthorn Farms, then Jones Farm campus adjacent to the airport in 1982, and finally by the Ronler Acres campus in 1994.[30] TriMet opened aMetropolitan Area Express (MAX) light rail line into the city in 1998. A cultural center was added in 2004, and a new city hall was completed in 2005. In 2008, SolarWorld opened a facility producing solarwafers, crystals, and cells, the largest plant of its kind in the Western Hemisphere.[31] U.S. PresidentBarack Obama visited the city and Intel's Ronler Acres campus in February 2011.[32]
TheUnited States Census Bureau reports the city has a total area of 21.6 sq mi (55.9 km2), all of which is land. In 2013, Hillsboro itself reported an area of 23.88 sq mi (61.8 km2), equivalent to 15,283 acres (61.8 km2).[33] The city is located in theTualatin Valley, and theTualatin River forms part of the southern city limits. The city's terrain is fairly level, consistent with an agricultural past and the farms still in operation.[34][35] Hillsboro is about 17 mi (27 km) west ofPortland and immediately west ofBeaverton, at an elevation of 194 ft (59 m) abovesea level.[3] In addition to the Tualatin River, streams includeDairy Creek, McKay Creek, Rock Creek, Dawson Creek, and Turner Creek. Neighboring communities in addition to Beaverton areAloha,Cornelius,Glencoe,North Plains,Reedville,Scholls, andWest Union.
Hillsboro's street system differs from many others in the county.[36] Most cities in Washington County use a numbering system andcardinal direction orientation based on a grid that begins at theWillamette River in downtown Portland, which was originally part of Washington County.[36] For example, the street names in Beaverton generally include Southwest (SW) prefixes because Beaverton lies in the southwest quadrant of the Portland grid. Previously, some county road names and addresses in Hillsboro conformed to the Portland grid instead of Hillsboro's internal cardinal direction grid.[37] In January 2015, the city began the process of making all addresses and streets within Hillsboro conform to the internal grid, through the Connecting Hillsboro Address Project.[38]
The internal grid in Hillsboro centers on the downtown intersection of Main Street, which runs east–west, and First Avenue, which runs north–south. Most addresses within the city include a quadrant prefix: NW, NE, SW, or SE. Main Street is simply designated as East Main or West Main, and First Avenue is only North First or South First.[39] Addresses on the streets' south side and the avenues' east side have even numbers, while odd numbers are on the opposite side.[39] Hillsboro's street system contains 20 blocks per mile (12.5 blocks per kilometer).[39]
North–south through roadways are calledavenues, while east–west roadways are calledstreets.[40] Allcul-de-sacs are namedcourts.[40] Private roadways are namedways orplaces.[40] Roads that curve can be nameddrives.[40] Alleys are namedlanes.[40] Non-city streets may not conform to these naming conventions.[37]
The city's municipal code has designated several special plan areas, each of which follow area-specific plans and codes:
Downtown encompasses the original city core and the area immediately surrounding it.[41] Blocks in the downtown core are 400 ft (120 m) long on each side.[42]
Orenco consists of the Orenco Townsite Conservation zone (encompassing a former company town originally created by theOregon Nursery Company) and theOrenco Station sub-area, which is described in the city code as a "compact, transit-supportive mixed-use neighborhood with reduced automobile reliance".[43]
Amberglen, located just south of theTanasbourne neighborhood, is envisioned as "a vibrant, regional activity center enlivened with high-quality pedestrian and environmental amenities, taking advantage of the region’s light rail system".[45] Located within the district isOregon Health & Science University's West Campus.
The South Hillsboro planning district encompasses the newly annexed South Hillsboro neighborhood, described in the city code as "a complete, connected and green community".[46] The neighborhood, built on land once used as a hobby farm byWilliam Ladd andSimeon Reed,[47] is slated to become "a residential mixed-use community organized around a town center and complemented by a village center".[46]
The North Hillsboro Industrial Area Plan District[48] lies within Hillsboro's Industrial District, where many of theSilicon Forest's manufacturing and technology businesses reside. Over half of the city's total employment is located within the Hillsboro Industrial District.[49]
The city's Comprehensive Plan outlines several other plan areas not defined in the city code:Quatama,Tanasbourne, NE 28th Ave/East Main Street Plan Area, andWitch Hazel Village.[50]
Summers in Hillsboro are generally warm, but temperatures year-round are moderated by a marine influence from the Pacific Ocean.[51] TheWillamette Valley in which Hillsboro lies receives the majority of itsprecipitation during the winter months, with the wettest period from November through March.[51] This occasionally includes snowfall.[52] Hillsboro receives precipitation on 161 days per year, on average.[53] The average yearly precipitation between 1930 and 1998 was 38 in (970 mm).[54] August is the warmest month with an average high temperature of 81 °F (27 °C), while January is the coolest month with an average high of 46 °F (8 °C).[55] The highest recorded temperature, 114 °F (46 °C), occurred on June 28, 2021, and the lowest, −14 °F (−26 °C), occurred in January 1930.[55]
Like the rest of the Willamette Valley, Hillsboro lies in the Marine West Coast climate zone, with Mediterranean characteristics.
Climate data for Hillsboro, Oregon (1991–2020 normals, extremes 1929–present)
Hillsboro's population grew from 402 in 1880 to 2,016 by 1910, making it the county's most populated city, according to the1910 census data.[60] By 1970, it had increased to more than 15,000, although neighboring Beaverton had overtaken it as the county's most populous city.[61] By 1990 there were more than 37,000 residents, and commuters raised this to 110,000 during daytime.[62][63] At the 2010 Census, the population was 91,611,[64] fifth in rank among the state's largest cities behind Portland,Eugene,Salem andGresham and slightly ahead of Beaverton, which ranked sixth.[65] This figure was a 30.5% increase from Hillsboro's 70,186 residents in 2000, which made Hillsboro the fourth fastest-growing city in the state during the 2000s (decade), and the fastest-growing city in theWillamette Valley over the same period. In 2007, there were 17,126 houses lived in by their owners, with an average home price in the city of $246,900.[66]Bloomberg Businessweek listed the city as the fastest-growing in Oregon for the period between 1990 and 2010, for cities with populations over 10,000.[67][68]
As of the2020 census, there were 106,447 people, 40,891 households, and 25,874 families residing in the city.[69] The population density was about 4,119/sq mi (1,600/km2). There were 42,363 housing units at an average density of about 1,639/sq mi (600/km2).[70]
Hillsboro racial and ethnic composition as of 2020[71] (NH = Non-Hispanic)[a]
Among the 40,891 households, about 27.8% had children under the age of 18 living with them, 51% were married couples living together, 7% had a female householder with no husband present, 5% had a male householder with no wife present, and 37% were non-families. About 26% of all households were made up of individuals, and about 8% had someone living alone who was 65 years of age or older. The average household size was 2.58 and the average family size was 3.21.[69]
The median age in the city was 34.8 years. About 20% of residents were under the age of 18 and 11% were 65 years of age or older The gender makeup of the city was 50.0% male and 50.0% female.[71]
As of the2010 census, there were 91,611 people, 33,289 households, and 22,440 families residing in the city. The population density was about 3,800/sq mi (1,500/km2). There were 35,487 housing units at an average density of about 1,500/sq mi (600/km2).
Hillsboro racial composition as of 2010[73] (NH = Non-Hispanic)[b]
Among the 33,289 households, about 38% had children under the age of 18 living with them, 51% were married couples living together, 11% had a female householder with no husband present, 5% had a male householder with no wife present, and 33% were non-families. About 24% of all households were made up of individuals, and 6% had someone living alone who was 65 years of age or older. The average household size was 2.71 and the average family size was 3.24.
The median age in the city was 32 years. About 27% of residents were under the age of 18; 9% were between the ages of 18 and 24; 35% were from 25 to 44; 21% were from 45 to 64; and 8% were 65 years of age or older. The gender makeup of the city was 50.2% male and 49.8% female.
As of the2000 census, there were 25,079 households, of which about 38% had children under the age of 18 living with them, 55% were married couples living together, 9% had a female householder with no husband present, and 32% were non-families. About 23% of all households were made up of individuals, and 5% had someone living alone who was 65 years of age or older. The average household size was 2.8 and the average family size was 3.3.
City residents included about 28% under the age of 18, 11% from 18 to 24, 37% from 25 to 44, 17% from 45 to 64, and 6% who were 65 years of age or older. The median age was 30 years. For every 100 females, there were about 106 males.
Themedian household income was about $52,000 and the median family income was $57,000. Males had a median income of $41,000 compared to $30,000 for females. The per capita income for the city was about $22,000. Approximately 6% of families and 9% of the population were below thepoverty line, including 11% of those under age 18 and 8% of those age 65 or over. In 2007, 28% of people 25 and older held at least a bachelor's degree, while an additional 11% held an associate degree.[66] Those with less than a high school diploma made up 15% of the population, and 22% of residents had more than a high school diploma but less than a college degree.[66]
For the year 2011, the city had 180violent crimes reported to law enforcement, and 2,154 reports ofproperty crimes.[74] The violentcrime rate was 157.2 per 100,000 people compared to a national average of 309.3[75] and 287 for Oregon.[76] Property crime nationally was 3,335[75] per 100,000 compared to 3,203 in Hillsboro, and 4,402 for the state.[76] Violent offenses include forcible rape, robbery, murder, non-negligent manslaughter, and aggravated assault. Property crimes include arson, motor vehicle theft, larceny, and burglary.[74] Statistics published by the Oregon Criminal Justice Commission showed a slight downward trend in the Washington County crime rate between 1991 and 2005. The rate for index crimes, a group comprising the combined violent offenses and property crimes mentioned above, was 3,930 per 100,000 in 1991 and rose to 4,440 per 100,000 in 1997 before falling to 3,410 per 100,000 in 2005.[77]
Manufacturing is the leading employment sector in Hillsboro, employing 24% of the workforce, followed by health care, education, and social services with a total of 15%.[66] One example of a manufacturer headquartered in Hillsboro is Beaverton Foods, a family-ownedcondiment manufacturer since 1929, with 70+ employees and $25 million in annual sales; it moved to its current headquarters in 2001.[79] Retail employment constitutes 12%, construction makes up 7%, and 13% of workers are employed in the administrative, scientific, professional, or waste management industries.[66] 68% of workers commute alone to the workplace, and 8% use public transportation.[66] The average one-way commute time is about 24 minutes.[66]
Many technology companies operate in Hillsboro, making it the center of Oregon'sSilicon Forest.[80][81] In particular,Intel's[82] largest site is in Hillsboro, and includes three large campuses: Ronler Acres, Jones Farm, and Hawthorn Farm, along with several smaller campuses that employ about 16,000 workers.[83] Other high-tech companies operating facilities in Hillsboro includeSynopsys, Epson,[84]Salesforce,[85] and Oracle's (formerly Sun Microsystems) High-End Operations. Hillsboro is the corporate headquarters forRadiSys andPlanar Systems among others.[86]
In 2006,Genentech announced plans to locate a packaging and distribution facility on 100 acres (0.40 km2) in Hillsboro.[87] The $400 million facility opened in 2010, which Oregon officials hoped would eventually also be used for research and development for thebiotechnology company.[88] Other biotech or medical companies based in Hillsboro includeFEI Company andAcumed.[89]
The city is also a landing point on three fiber optic cable systems linking the United States across the Pacific Ocean:C2C,Southern Cross Cable, andVSNL Transpacific. These cable landings, lower energy costs, and tax breaks led to a boom ofdata centers being built starting about 2010.[90] Data centers include those for Adobe, NetApp,Umpqua Bank, OHSU, and Fortune Data Centers.[90]
Hawthorn Farm Intel campus
Hillsboro serves as the corporate headquarters forRodgers Instruments,Soloflex,Norm Thompson Outfitters, andParr Lumber, among others. Fujitsu and NEC Corporation formerly had factories in Hillsboro.[91] Hillsboro is also home to theLaika stop-motion animation studio, creator of the Oscar-nominated feature filmsCoraline (2009) andParanorman (2012).[92] In addition, Erickson Aero Tanker, an aviation company which operatesMcDonnell Douglas MD-87 jetliners converted for use as aerial firefightingair tankers, is based in Hillsboro.[93]
Hillsboro's primary commercial cores are concentrated along Tualatin Valley Highway and Cornell Road. Additionally, the Tanasbourne neighborhood is a regional shopping area on the eastern edge of the city.[97] The neighborhood is home to the lifestyle shopping centerThe Streets of Tanasbourne.[98] The $55 million outdoor complex with 368,000 sq ft (34,200 m2) of retail space opened in 2004 withMeier & Frank (laterMacy's) as the anchor tenant.[97][98]
The other large shopping center in the city isThe Sunset Esplanade, located along Tualatin Valley Highway.[99] In November 2005, the world's largestCostco, a warehouse club store, opened in Hillsboro.[100] The store, with 205,000 sq ft (19,000 m2) of floor space, is about 60,000 sq ft (5,600 m2) bigger than the average Costco.[101]
Hillsboro's annual Fourth of July Parade is the second-largest Independence Day parade in Oregon.[110][111] TheOregon International Air Show, Oregon's largest air show, is held each year during the summer at the Hillsboro Airport.[66] Each summer the city offers a free concert series at Shute Park (Showtime at Shute),[112] while the Washington County Fair is held annually at the Westside Commons (county fairgrounds) adjacent to the airport.[113] The nameWestside Commons is a 2019 renaming of the Washington County Fairgrounds (also known as Fair Complex).[114] A new 89,000 sq ft (8,300 m2)[115] conference center and exhibition hall, known as the Wingspan Event & Conference Center,[114] opened at the Commons in August 2020,[116] replacing buildings demolished in 2018.
Hillsboro operates two library branches. Opened in 2007 after a smaller location was closed, the 38,000 sq ft (3,500 m2) main branch is located in the north-central section of the city.[117] The older, smaller second branch is in Shute Park in the southwest area of the city. TheHillsboro libraries are part ofWashington County Cooperative Library Services, which allows residents to use other libraries in the county and includesinterlibrary loans.[118]
Landmarks in Hillsboro include theWashington County Courthouse, the seat of county government.[125] Along the western edge of the city isHillsboro Pioneer Cemetery, established in 1870, which serves as the final resting place of city pioneers and politicians.[126] Next to the airport is the Westside Commons (known as the Washington County Fairgrounds, or Fair Complex, until 2019), home to the annual county fair.[127] Located atShute Park was the 25 ft (7.6 m) tall wood sculptureChief Kno-Tah, donated to Hillsboro and dedicated in 1987 as part ofPeter Wolf Toth'sTrail of the Whispering Giants.[128][129][130][131] Due to storm damage, it was removed in 2017.[132]
The city has two professional sports teams, thePortland Timbers 2 (T2) ofMLS Next Pro who began play at Hillsboro Stadium in 2020 and theHillsboro Hops of theNorthwest League, aMinor League Baseball club affiliated with theArizona Diamondbacks. The baseball team relocated from Yakima, Washington, in 2012 and began play as the Hops on June 14, 2013, with its inaugural home game at the new Ron Tonkin Field on June 17.[133]
Hillsboro Ballpark (formerly Ron Tonkin Field)The Wingspan Event and Conference Center was completed in 2020 at the Westside Commons (formerly Washington County Fairgrounds) and hosts the annual county fair, among other events.
Hillsboro's Department of Parks and Recreation operates more than 20 facilities, including the Gordon Faber Recreation Complex, which includesHillsboro Stadium andHillsboro Ballpark (formerly Ron Tonkin Field). There are 23 parks, two sports complexes, the Walters Cultural Arts Center, theShute Park Aquatic & Recreation Center, and three other mixed-use facilities.[134] The city also owns theJackson Bottom Wetlands Preserve along the Tualatin River on the south side of the community.[135]
Hillsboro operates under acouncil–manager form of city government. Voters elect sixat-large councilors and a mayor, who each serve four-year terms, subject to a charter-imposed limitation of two consecutive terms.[136] The mayor and council appoint acity manager to conduct the ordinary business of the city. Policy decisions are the responsibility of the council and mayor. Administrative functions are carried out by the manager and manager-appointed staff.[137] Government functions are centered at theHillsboro Civic Center, which houses the office of the city manager and is the location of the twice-monthly city council meetings.[136] As of 2025, Beach Pace was the mayor; Olivia Alcaire, Kipperlyn Sinclair, Saba Anvery, Elizabeth Case, and Rob Harris were the city councilors.[138] Robby Hammond serves as the city's manager.[139]
Public schools in Hillsboro are operated by theHillsboro School District (1J). The district is aunified school district with twenty-three elementary schools, four middle schools, and four high schools.[66] The district also operates theMiller Education Center, an alternative school, theHare Field athletic complex, andCity View Charter School.[147] The school district covers Hillsboro,Scholls,Reedville,North Plains,West Union, and other surrounding communities.[66] Total enrollment as of the 2022–23 school year was 18,872 students, making it the fourth-largest district in the state (behind Portland, Salem-Keizer, and Beaverton).[148] The four traditional public high schools are, in order of creation:
The weeklyHillsboro Tribune, launched in 2012, was based in Hillsboro. It was replaced in 2019 by a Hillsboro edition of theNews-Times, a weekly newspaper owned by the same company and based in nearbyForest Grove.[152] Historically, the city's longtimenewspaper of record was the weeklyHillsboro Argus newspaper (published twice-weekly from 1953 to 2015).[153] It was published in Hillsboro for more than 120 years until its discontinuation in 2017.[154]
The city is also served by Portland-based media outlets, includingThe Oregonian,Willamette Week, and all broadcast stations.[62]Local FM radio stationKQRZ-LP airing Oldies on 100.7 MHz is licensed by the FCC to Hillsboro and is simulcast on 96.7 MHzKICN-LP. AM radio stationKUIK was based in Hillsboro until sold in 2018. KUIK was a 5,000-watt station broadcasting at the 1360 frequency.
Oregon Route 8, known locally as theTualatin Valley Highway (TV Highway), is the primary east–west highway.[83]U.S. Route 26, also known as theSunset Highway, bisects the northeast corner of the city. Other major east–west roads areCornell Road and Main Street (formerly Baseline Road).[62] Major north–south routes areOregon Route 219 / 1st Avenue, 10th Avenue,Cornelius Pass Road, and Brookwood Parkway.[62] The easternmost north–south route, 185th Avenue, borders Beaverton and runs between the Tanasbourne Town Center and the rest of Hillsboro. TV Highway connects toCornelius andForest Grove to the west and Beaverton to the east.
Hillsboro operates its own library system, fire department, parks department, water system, police department,[62] and municipal internet service. TheHillsboro Fire Department has five stations, and theHillsboro Police Department operates two standard precincts and a mobile precinct.[62][163][164] Wastewater treatment is provided through the county-wideClean Water Services. The city's municipal internet service,HiLight, was initially launched in 2020 and expects to cover all households by 2027.[165][166]
Hillsboro's onlysister city relationship is withFukuroi,[174] a city of about 85,000 residents in theShizuoka Prefecture in central Japan. The cities, which have similar economic bases in agriculture and high technology, began their relationship in November 1988.[175] The relationship has included exchanges of students between schools in each city.[176] In the late 2000s, Hillsboro unsuccessfully explored finding a sister city in Mexico[177] and also neglected the relationship with Fukuroi.[178] However, in 2008, a Fukuroi contingent of adults visited Hillsboro to celebrate the 20th anniversary of the Sister City agreement.[179]
^"Oregon".About Counties. National Association of Counties. 2005. Archived fromthe original on June 7, 2008.
^abcBuan, Carolyn M. (1999).This Far-Off Sunset Land: A Pictorial History of Washington County, Oregon. Virginia Beach, Virginia: Donning Company Publishers.ISBN1-57864-037-7.
^abc"Washington County Probate Court Records".Provisional & Territorial Records. Film 24 (Reel 15). Washington County Probate Court: 10. February 5, 1850.
^"Washington County Probate Court Records".Provisional & Territorial Records. Film 24 (Reel 15). Washington County Probate Court: 39. August 1850.
^Philpott, Betty (October 19, 1976). "Hillsboro school began in one-room log cabin in 1854".The Hillsboro Argus.
^Baker, Frank C. (1891)."Special Laws".The Laws of Oregon, and the Resolutions and Memorials of the Sixteenth Regular Session of the Legislative Assembly Thereof. Salem, Oregon: State Printer: 770.Archived from the original on February 25, 2023. RetrievedNovember 28, 2020.
^ab"The Hub: Mayors City of Hillsboro".The Hillsboro Argus. October 19, 1976. p. 6.
^"The Hub: Council-manager form works well".The Hillsboro Argus. October 19, 1976. p. 2.
^"Links Together County Seats".The Oregonian. October 1, 1908. p. 6.
^abDill, Tom; Grande, Walter R. (1994).The Red Electrics: Southern Pacific's Oregon Interurban. Edmonds, WA: Pacific Fast Mail. pp. 23, 96.ISBN0-915713-28-4.
^ab"Washington County History".Oregon County Historical Records Guide. Oregon State Archives.Archived from the original on March 7, 2018. RetrievedFebruary 2, 2008.
^Taylor, George H; Hannan, Chris (1999).The Climate of Oregon: From Rain Forest to Desert. Corvallis: Oregon State University Press. p. 51.ISBN0-87071-468-6.
^"Interactive display of crime and arrest data for the State of Oregon".Oregon Crime Data. Oregon Criminal Justice Commission. Archived fromthe original on January 28, 2010. RetrievedJanuary 30, 2009. To view the Washington County statistics, select "Washington County" on the first interactive screen and "Summary Rates" on the second screen. For ease of comparison, rates given as crimes per 10,000 have been converted to crimes per 100,000 by multiplying by 10.
^Siemers, Erik (January 14, 2011)."Beaverton Foods Spices Up Sales".Portland Business Journal.Archived from the original on December 21, 2013. RetrievedDecember 11, 2013.
^Silverman, Julia (June 1, 2003). "Town closes schools early to save money".Houston Chronicle.
^Frank, Ryan (November 3, 2003). "Hillsboro police fold high-tech crime team".The Oregonian. p. B2.
^Tims, Dana (October 10, 2002). "Southwest Zoner: Bedroom communities no more".The Oregonian. p. 1.
^abSuh, Elizabeth (October 28, 2007). "Intel's impact on community helps other businesses thrive".The Oregonian. p. S9.
^"2006 Annual Report"(PDF). FEI Company.Archived(PDF) from the original on October 25, 2007. RetrievedOctober 8, 2007.
^abSiemers, Erik (October 21, 2011)."Hillsboro's data center surge".Portland Business Journal.Archived from the original on December 21, 2013. RetrievedNovember 11, 2012.
^Read, Richard (March 7, 2004). "Racing the world".The Oregonian. p. A1.
^Gordanier, Susan (July 11, 2008)."Venetian Theatre opens (at last)".The Hillsboro Argus. The Oregonian.Archived from the original on June 9, 2011. RetrievedNovember 24, 2008.
^Puterbaugh, Candy (August 2, 2007). "Metro South Neighbors: Group offers more than singalongs".The Oregonian. p. 17.
^Campbell, Polly (July 8, 2004). "West Zoner: Concerts bring crowds to Hillsboro park".The Oregonian. p. 2.
^"Think minutes, not hours, in finding entertainment".The Oregonian. October 28, 2007. p. S10.
^"West Zoner: Highlights, lowlights and other dubious achievements of the year 2001".The Oregonian. December 27, 2001. p. 1.
^Trappen, Michelle (October 26, 2007). "Farm near Hillsboro named historic".The Oregonian.
^"Weekly Listings: January 23, 2015"(PDF).National Register of Historic Places. U.S. National Park Service.Archived from the original on April 29, 2015. RetrievedJanuary 26, 2015.
^Smith, Jill (November 4, 2004). "West Zoner Beaverton: Art straddles boundary between past, present".The Oregonian. p. 2.
^ab"Life Styles: Historic names mark old gravestones".The Hillsboro Argus. October 19, 1976. p. 5.
^Potter, Connie (April 23, 1992). "West Zoner: Hillsboro students eager for trip to Japan".The Oregonian. p. 8.
^Bermudez, Esmeralda (July 28, 2006). "Mayor crossing border for broader view".The Oregonian. p. B3.
^Parks, Casey (August 23, 2007). "Metro East Neighbors: Sister city status with China city hits snags".The Oregonian. p. 1.
^Gordanier, Susan (March 24, 2009). "The Hillsboro Argus: Fukuroi Teens Taste Hillsboro Hospitality".The Hillsboro Argus. p. A1.
^Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category.[72]
^Note: the US Census treats Hispanic/Latino as an ethnic category. This table excludes Latinos from the racial categories and assigns them to a separate category.[72]
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