The legislature of the provisionalState of Deseret defined the county in an October 5, 1850, act, which also designated Farmington as the seat due to its location midway between boundaries at theWeber River on the north and theJordan River on the south. It was named forDaniel C. Davis,[4] a captain in theMormon Battalion. The county boundaries were altered in 1852, 1854, 1855, and in 1862. In 1880 the county gained part of the islands and waters ofGreat Salt Lake that had previously been attached toSalt Lake County. The county boundary has remained unchanged since that time.[5]
During its first 50 years, Davis County grew slowly. With the advent of theUtah Central Rail Road in 1870, a transition to mechanized agriculture and a surge of commerce, banking, improved roads, new water systems, and electrification of homes began. However, by 1940, the population was barely 16,000.
With the establishment ofHill Air Force Base in northern Davis County and southernWeber County,[6] there was a surge in civilian employment afterWorld War II. The county doubled in population between 1940 and 1950 and doubled again between 1950 and 1960 as part of the nationwidesuburb boom that was occurring at the time. By 1990 there were 188,000 residents, and in 2000, there were 239,000. As of 2020, the county population is above 360,000.
Davis County has an area of 634 square miles (1,640 km2), of which 299 square miles (770 km2) is land and 335 square miles (870 km2) (53%) is water.[7] It is Utah's smallest county by land area and second smallest by total area.
The county lies generally between theGreat Salt Lake on the west and theWasatch Range on the east, which rises to a height of 9,707 feet (2,959 m) in the county at Thurston Peak.[8]
The Great Salt Lake is surrounded bymarshland andmudflats, and lies at an averageelevation of approximately 4,200 feet (1,300 m), varying depending on the water level, which can lead to drastic changes in the lake size due to its shallowness. Davis County includesAntelope Island, the lake's largest island. The entire island is astate park, designated to protect natural scenery and especially wildlife on the island, which includesbighorn sheep,pronghorn, and abison herd.
The inhabited portion of Davis County between the lake and the mountain range is called theWasatch Front, a narrow stretch of land that restricts north–south transportation in the county.
Eastern parts of Davis County experience ahumid continental climate (Dsa), while western parts may experience amediterranean climate (Csa). Summers are dry and hot and winters are cold and wet, but rarely frigid. Snow is frequent during winter, with up to 90 in (230 cm) annually on high bench areas in the east and at least 60 inches (150 cm) on the valley floor. Annual precipitation averages between 18 and 25 inches (460 and 640 mm) in the county, with spring being the wettest season and summer the driest. Summers are hot, with several days each year averaging above 95 °F (35 °C). However, the humidity is low, making for comparatively comfortable temperatures. In winter, temperatures sometimes drop below 0 °F (−18 °C), but rarely for extended periods of time. Compared toSalt Lake County to the south, the weather in Davis County is extreme.Lake-effect snows hit the southern portion of the county harder, and even in non-lake-effect storms, the lack of arain shadow in Davis County (much of Salt Lake County lies in the rain shadow of theOquirrh Mountains) means that storms often hit Davis County harder. In addition, canyon winds from the east can sometimes cause devastating wind damage, and wind gusts above 100 mph (160 km/h) have been reported. This occurs when a powerful high pressure system is overWyoming, and is a frequent occurrence. Extreme wind events, however, seem to have declined in frequency in recent years.[10]
There were 182,251 (50.25%) males and 180,428 (49.75%) females, and the population distribution by age was 116,295 (32.1%) under the age of 18, 207,510 (57.2%) from 18 to 64, and 38,874 (10.7%) who were at least 65 years old. The median age was 31.4 years.
There were 111,552 households in Davis County with an average size of 3.25 of which 88,909 (79.7%) were families and 22,643 (20.3%) were non-families. Among all families, 72,995 (65.4%) weremarried couples, 5,369 (4.8%) were male householders with no spouse, and 10,545 (9.5%) were female householders with no spouse. Among all non-families, 18,004 (16.1%) were a single person living alone and 4,639 (4.2%) were two or more people living together. 50,193 (45.0%) of all households had children under the age of 18. 84,985 (76.2%) of households wereowner-occupied while 26,567 (23.8%) wererenter-occupied.
The median income for a Davis County household was $87,570 and the median family income was $96,482, with aper-capita income of $32,819. The median income for males that werefull-time employees was $63,558 and for females $42,136. 5.3% of the population and 4.2% of families were below thepoverty line.
As of the2010 United States census, there were 306,479 people, 93,545 households, and 76,205 families in the county. Thepopulation density was 1,025 people per square mile (396 people/km2). There were 97,570 housing units at an average density of 320.95 units per square mile (123.92 units/km2). The racial makeup of the county was 90.04%White, 1.21%Black orAfrican American, 0.46%Native American, 1.77%Asian, 0.59%Pacific Islander, 3.24% fromother races, and 2.69% from two or more races. 8.42% of the population wereHispanic orLatino of any race.
There were 93,545 households, out of which 45.1% had children under the age of 18 living with them, 67.99% weremarried couples living together, 9.59% had a female householder with no husband present, and 18.54% were non-families. 15.23% of all households were made up of individuals, and 5.27% had someone living alone who was 65 years of age or older. The average household size was 3.24 and the average family size was 3.63.
The county population contained 37.23% under the age of 20, 6.56% from 20 to 24, 28.13% from 25 to 44, 19.92% from 45 to 64, and 8.15% who were 65 years of age or older. The median age was 29.2 years. For every 100 females, there were 100.85 males. For every 100 females age 18 and over, there were 97.09 males.
A three-memberboard of commissioners is the county's governing body. The commissioners are elected to staggered four-year terms. They are responsible for all county services and operations. They approve, adopt, and amend the budget; they also serve as the legislative body and regulate business licensing in the county's unincorporated areas. The county commissioners (as of 2021) are:
Bob J. Stevenson, chair (term ends January 5, 2027)
Randy B. Elliott, vice chair (term ends January 6, 2025)
Lorene Miner Kamalu (term ends January 5, 2027)[19]
Other elected offices include the County Attorney, Assessor, Clerk/Auditor, Sheriff, Recorder, Surveyor, and Treasurer.
The assessor is responsible for the valuing of all real property in the county. The current assessor is Dale Peterson (as of March 2018).[20]
The clerk/auditor serves as the county's chief financial and budget officer. The current Clerk/Auditor is Curtis Koch (as of March 2018).[21]
The treasurer is responsible for collection and investing of county funds. The current Treasurer is Mark Altom (as of March 2019).[22]
Davis County voters are traditionally Republican. In no national election since 1948 has the county selected the Democratic Party candidate (as of 2024).
Davis County is often characterized as abedroom community. According to the Census Bureau's 2004 American Community Survey, 42.3% of the population work in another county.[41] South Davis County commuters who work inSalt Lake County frequently encounter commuting time traffic bottlenecks between Davis andSalt Lake Counties. TheLegacy Parkway and theFrontRunner commuter rail project were built to alleviate this problem.
The commuter rail stations in the county have spurred plans for extensive transit-oriented development (TOD), including the Station Park development inFarmington. Farmington is also the home of theLagoon Amusement Park, the primary amusement park on the Wasatch Front.
Davis County's largest employer isHill Air Force Base. Earnings of civilians at Hill AFB are almost double the state average. Hill AFB accounts for about 12% of the economy of Davis County and about 2.6% of the economy of Utah.[42] Hill AFB provides employment for nearly 23,000 military and civilian personnel (approximately 4,500 active duty, 1,200 reservists, 13,000 federal civil servants, and 4,000 civilian contractors).[43] Other large employers includeDavis School District,Lagoon Amusement Park, andLifetime Products.[44]
Panorama of Davis County from Fernwood Park inLayton
Public education in Davis County is provided by theDavis School District. There are currently 59 elementary schools, 16 junior high schools, 9 high schools, and 3 alternative schools in the school district. The high schools are as follows, showing where they are located:
The most important road in the county isInterstate 15, which runs north–south through the center of the county.US-89 enters parallel to I-15 fromSalt Lake County to the south and runs north throughNorth Salt Lake andBountiful as a city road before merging with I-15. It re-emerges inFarmington near theLagoon Amusement Park, heading along the eastern benches on the slopes of the Wasatch Range, enteringWeber County nearSouth Weber. The Utah Department of Transportation is currently (2019) upgrading US-89 to a freeway through easternLayton north to its interchange withI-84 near the Weber County border. Congestion is a significant problem in the county, as east–west transportation is restricted by the narrow urban corridor and many of its citizens commute south to Salt Lake County.
To relieve congestion in the county, theLegacy Parkway began construction in 2006. Construction began near the US-89/I-15 interchange in Farmington in 2004, but was soon halted due to a lawsuit filed byenvironmentalists, who were concerned that the road would harm marshlands along the eastern edge of the Great Salt Lake. They requested an independent evaluation for completeness of theenvironmental impact statement. A settlement was reached in 2005 and the final injunction was lifted in 2006. The Legacy Parkway opened in 2008, running from the US-89/I-15 interchange in Farmington southward to connect withI-215 near the border with Salt Lake County. An extensive trail system, wetland protection measures, and landscaping were implemented along the highway in response to the environmentalist's concerns, in addition to a lower speed limit and a ban of semi-trailer trucks on the highway.[46] However, this compromise will expire in 2020, and the roadway is expected to begin functioning under normal Interstate System regulations (i.e. trucks and higher speed limits allowed).[47]
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