Illinois's 16th congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Darin LaHood R–Peoria
Area	9,030.5 sq mi (23,389 km2)
Distribution	71% urban 29% rural
Population (2024)	752,764
Median household income	$85,435[1]
Ethnicity	84.8%White 6.6%Hispanic 3.7%Two or more races 2.3%Asian 2.2%Black 0.4% other
Cook PVI	R+11[2]

The16th congressional district of Illinois is represented by RepublicanDarin LaHood. Prominent past representatives from the 16th district have includedEverett Dirksen, who went on to become the Republican leader in theUnited States Senate;John B. Anderson, who became the 3rd highest ranking Republican in the House and went on to run as a majorindependent candidate in the1980 United States presidential election; andLynn Martin, who later served asUnited States Secretary of Labor.

For more than six decades, the shape of the 16th district fluctuated far less than that of any other Illinois congressional district. At this time, it generally included the northwest corner of the state, extending just far enough to the east to grab its largest city,Rockford.^[3] By the 1990s, it also extended eastward to include part ofMcHenry County, an outer suburb of Chicago. This geographic stability also contributed to electoral stability. It first became a Rockford-based district for the 1948 election, and from then until 2012, it was represented by just five people, all but one of whom was a Republican. The sole Democrat to have held it in that period,John W. Cox, Jr., only did so for one term.

Thecongressional district covers parts ofDeKalb,Ford,Stark,Will andWinnebago counties, and all ofBoone,Bureau,Grundy,Iroquois,LaSalle,Lee,Livingston,Ogle andPutnam counties, as of the 2011 redistricting which followed the2010 census. All or parts ofBelvidere,Channahon,DeKalb,Dixon,Loves Park,Machesney Park,Ottawa,Morris,Pontiac,Rockford andStreator are included.^[4] The representatives for these districts were elected in the 2012 primary and general elections, and the boundaries became effective on January 5, 2013.

After the 2010 census, the 16th was significantly redrawn for the first time in decades. It was pushed to the east to include the southwestern exurbs of the Chicago metropolitan area, stretching from the Wisconsin border to the Indiana border. While it still included most of Rockford's suburbs, half of Rockford itself (mainly the Democratic-leaning western portion of the city) was shifted to the 17th district. The district was significantly redrawn again after the 2020 census, essentially merging the more Republican portions of the old 16th and18th districts.

• Rockford – 148,655
• Peoria – 113,150
• Bloomington – 78,680
• Normal – 52,736
• Pekin – 31,731
• Belvidere – 25,339
• Loves Park – 23,397
• Machesney Park – 22,950
• East Peoria – 22,484
• Morton – 17,117
• Washington – 16,071
• Dixon – 15,274
• Morris – 14,163
• Channahon – 13,383
• Streator – 12,500
• Pontiac – 11,150
• Roscoe – 10,983

• Harvard – 9,469
• Rochelle – 9,446
• South Beloit – 7,989
• Rockton – 7,863
• Princeton – 7,832
• Geneseo – 6,539
• Chillicothe – 6,128
• Peoria Heights – 5,908
• Coal City – 5,705
• Eureka – 5,227
• Candlewick Lake – 5,115
• Poplar Grove – 5,049
• Creve Coeur – 4,934
• Marseilles – 4,845
• West Peoria – 4,263
• Dwight – 4,032
• Metamora – 3,904
• Byron – 3,784
• Oregon – 3,604
• Le Roy – 3,512
• Gibson City – 3,475
• Germantown Hills – 3,412
• Galena – 3,308
• Cherry Valley – 2,905
• Mount Morris – 2,861
• Heyworth – 2,791
• Lena – 2,772
• El Paso – 2,756
• Diamond – 2,640
• Marquette Heights – 2,541
• Davis Junction – 2,512

Due to the 2020 redistricting, this district will shift to encompass most of centralNorthern Illinois, including covering the majority of the Wisconsin-Illinois border. The district takes inJo Daviess,Ogle,Lee,Stark,Marshall, andGrundy Counties; most ofWinnebago,Boone,Bureau,Henry, andMcLean Counties; half ofStephenson,Peoria,Tazewell,Putnam, andLivingston Counties; and part ofDeKalb andFord Counties.

Winnebago County is split between this district and the17th district. They are partitioned by West State Road, West State St, School St, Monroe St, Victory St, North Springfield Ave, Auburn St, North Central Ave, West Riverside Blvd, Eagle Dr, Soo Line Railroad, Park Ridge Rd, East Dr, River Ln, N 2nd St, Windsor Rd, N Alpine Rd, E Riverside Blvd, Forest Hills Rd, Pepper Dr, Cardamon Ln, Sage Dr, Gingeridge Ln, Applewood Ln, Windsor Rd/Broadcast Parkway, McFarland Rd, Harlem Rd, Illinois Highway 39, Keith Creek, Olde Creek Rd, N Trainer Rd, Spring Brook Rd, N Mulford Rd, Spring Creek Rd, Delcy Dr, Taliesen Ln/Jonquil Rd, Arbutus Rd, Saratoga Ln, Norwich Dr, Monticello Ln, Guilford Rd, Mauh-Nah-Tee-See, Inverness Dr, Donna Dr, Garrett Ln, Triton Ave, Apawamis Way E, Shiloh Rd, N Perryville Rd, Argus Dr, Deane Dr, US Highway 20, S Trainer Rd, Laurel Cherry Dr, Stony Creek Way, Newburg Rd, Homewood Dr, Dorchester Dr, Villanova Dr, Highland Ter, Wichita Dr, Capetown Ave, Charles St, S Mulford Rd, Forest Trail Dr, Samuelson Rd, 35th St, Tesa Rd, Sonja Ln, Lockout Dr, Houston Rd, Scarlet Oak Rd, Fruitland Dr, 20th St, Mobile Home Ave, 11th St, Falcon Rd, Beltline Rd, Kishwaukee Rd, Rock River, S Springfield Ave, Prairie Rd, and Tipple Rd. The 15th district takes in the communities ofSouth Beloit,Roscoe,New Milford,Machesney Park,Rockton,Lake Summerset (shared with Stephenson County),Durand,Pecatonica,Westlake Village,Argyle (shared with Boone County), andCherry Valley; most ofLoves Park; and part ofRockford (shared with Ogle County).

Boone County is split between this district and the11th district. They are partitioned by Orth Rd, Poplar Grove Rd, Woodstock Rd, McKinley Ave, Squaw Prairie Rd, Beloit Rd, Illinois Business Route 20, Kishwaukee River, Wynwood Dr, N Appleton Rd, S Appleton Rd, Illinois Highway 5, and Stone Quarry Rd. The 11th district takes in the communities ofCandlewick Lake,Capron,Argyle (shared with Winnebago County),Caledonia, andTimberlane; most ofBelvidere; and part ofPoplar Grove.

Bureau County is split between this district and the14th district. They are partitioned by Illinois Highway 26, US Highway 180, 2400 St E, and 2400 Ave N. The 16th district takes in the municipalities ofPrinceton,Wyanet,Buda,Sheffield,Mineral,Neponset,New Bedford,Manlius,Walnut,Tiskilwa,Ohio,Dover, andLa Moille.

Henry County is split between this and the17th district. They are partitioned on the northwest side by Shaffer Creek, Oakwood Cir, Oakmont Dr, Oakwood Country Club, Glenwood Rd, US Highway 6, E 450th St, Illinois Highway 280, Green River Rd, and Kings Dr. They are partitioned on the southeast side by E 1770th St, N 650th Ave/N 570th Ave, Timber Rd, E 2400th St, and N 1200 St. The 16th district takes in the communities ofCambridge,Geneseo,Orion,Atkinson,Annawan,Lynn Center,Ophiem,Alpha,Cleveland,Osco,Andover,Woodhull,Bishop Hill,Nekoma, andHooppole.

McLean County is split between this district and the17th district. They are partitioned by E 1000 North Rd, N 250 East Rd, E 1200 North Rd, Middle Fork Sugar Creek, E 1250 North Rd, N 750 East Rd, E 1300 North Rd, E 1280 North Rd, N 900 East Rd, E 1350 North Rd, E 1400 North Rd, N 1100 East Rd, N Rivian Motorway, King Mill Creek, Illinois Highway 74, Hovey Ave, S Cottage Ave, Gregory St, N Adelaide St, W Raab Rd, N Towanda Ave, E Shelbourne Dr, Old Route 66, Hershey Rd, E College Ave, Illinois Highway 55, Sugar Creek, General Electric Rd, Rainbow Ave, Mill Creek Rd, Clearwater Ave, Newcastle Dr, Illinois Highway 9, S Towanda Barnes Rd, Central Illinois Airport, Winchester Dr, S Hershey Rd, E Oakland Ave, S Veterans Parkway, S Mercer Ave, Norfolk and Southern Railroad, Rhodes Ln, E Hamilton Rd, S Morris Ave, Six Points Rd, W Oakland Ave, Fox Creek Rd, Crooked Creek Rd, Carrington Ln, and N 1200 East Rd. The 16th district takes in the communities ofLexington,Le Roy,Chenoa,El Paso (shared with Woodford County),Hudson,Gridley,Anchor,Saybrook,Bellflower,Colfax,Arrowsmith,Cooksville,Ellsworth,Towanda,Downs,Heyworth,Carlock,Twin Grove,Danvers, andStanford; northernNormal; and part ofBloomington.

Stephenson County is split between this district and the17th district. They are partitioned by Daws Rd, Howardsville Rd, Cedarville Rd, N Fawver Rd, and Maize Rd. The 16th district takes in the communities ofDavis,Dakota,Orangeville,Winslow,Rock City, andLake Summerset (shared with Winnebago County); northernCedarville; and part ofLena.

Peoria County is split between this district and the17th district. They are partitioned by W Gerber Rd/W Rosenbohm Rd, W Southport Rd, BN & SF Railroad, W Southport Rd, N Townhouse Rd, W Cottonwood Rd, N McAllister Rd, W Greengold Rd, W Farmington Rd, N Kickapoo Creek Rd, Saint Mary's Cemetery, N Swords Ave, N Northcrest Dr, C & NW Railroad, Weaverridge Golf Club, W Charter Oak Rd, Illinois Highway 6, W War Memorial Dr, N Allen Rd, W Northmoor Rd, Big Hollow Creek, West Imperial Dr, West Willow Knolls Dr, North University St, Manning Park, West Teton Dr, Illinois Highway 40, North Prospect Rd, East Prospect Ln, North Montclair Ave, East Euclid Ave, North Grandview Dr, Forest Park Nature Center, Forest Park Apartments, North Galena Rd, Illinois Highway 29, and Forest Park Riverfront-Longshore. The 16th district takes in the communities ofChillicothe,Brimfield,Princeville,Dunlap,Rome,Mossville; northernPeoria; and part ofPeoria Heights (shared with Woodford County),West Peoria,Bellevue, andNorwood.

Tazewell County is split between this district and the17th district. They are partitioned by Illinois River, S 3rd St, Prince St, Elm St, Maple St, Mechanic St, Koch St, 5th St, Illinois Central Railroad, Townline Rd, Highway I-55, Illinois Highway 122, Indian Creek, Southwest Lincoln St, Southeast Main St, Hopedale Rd, Springtown Rd, Mackinaw Rd, and Lagoon Rd. The 16th district takes in the communities ofEast Peoria,Washington,Morton,Hopedale,Minier,North Pekin,Heritage Lake,Mackinaw,Deer Park (shared with Woodford County),Creve Coeur,Marquette Heights,Goodfield (shared with Woodford County), andTremont; most ofPekin; and part ofSouth Pekin.

Putnam County is split between this district and the17th district. They are partitioned by the Illinois River, S Front St, E High St, N 2nd St, E Court St, E Mulberry St, N 3rd St, N 4th St, N 6th St, E Sycamore St, S 5th St, Coffee Creek, Illinois Highway 26, and N 600th Ave. The 16th district takes in the communities ofMcNabb andMagnolia.

Livingston County is split between this district and the2nd district. They arthee partitioned by N 1800 Rd East, E 1550 Rd North, N 1600 Rd East, E 1500 Rd North, N 1500 Rd East, W Reynolds St, Highway 55, The Slough, E 1830 Rd North, Old IL-66 South, N 1700 Rd East, N 2125 Rd North, and N 1800 Rd East. The 16th district takes in the communities ofCornell,Flanagan, andLong Point; and part ofPontiac.

DeKalb County is split between this district, the11th district, and the14th district. They are partitioned by Myelle Rd, Bass Line Rd, Illinois Highway 23, Whipple Rd, Plank Rd, Swanson Rd, and Darnell Rd. The 16th district takes in the municipality ofKirkland.

Ford County is split between this district and the2nd district. They are partitioned by E 900N Rd, N Melvin St, E 8th St, and N 500E Rd. The 16th district takes in the municipality ofGibson City.

McHenry County is split between this district and the9th district,10th district, and11th district. The 16th district takes in the communities ofBig Foot Prairie,Alden,Harvard,Lawrence, andChemung.

LaSalle County is split between this district and the14th district. The 16th district takes in the communities ofRansomGrand Ridge,Kangley,Streator (shared with Livingston County),Leonore,Lostant,Rutland, andDana; and part ofSeneca,Marseilles, andTonica.

Member	Party	Years	Cong ress	Electoral history	District location
District created March 4, 1873
James S. Martin (Salem)	Republican	March 4, 1873 – March 3, 1875	43rd	Elected in 1872. Lost re-election.	1873–1883 [data missing]
William A. J. Sparks (Carlyle)	Democratic	March 4, 1875 – March 3, 1883	44th 45th 46th 47th	Elected in 1874. Re-elected in 1876. Re-elected in 1878. Re-elected in 1880. Retired.
Aaron Shaw (Olney)	Democratic	March 4, 1883 – March 3, 1885	48th	Elected in 1882. Retired.	1883–1893 [data missing]
Silas Z. Landes (Mount Carmel)	Democratic	March 4, 1885 – March 3, 1889	49th 50th	Elected in 1884. Re-elected in 1886. Retired.
George W. Fithian (Newton)	Democratic	March 4, 1889 – March 3, 1895	51st 52nd 53rd	Elected in 1888. Re-elected in 1890. Re-elected in 1892. Redistricted to the19th district and lost re-election there.
					1893–1895 [data missing]
Finis E. Downing (Virginia)	Democratic	March 4, 1895 – June 5, 1896	54th	Elected in 1894. Lost contested election.	1895–1903 [data missing]
John I. Rinaker (Carlinville)	Republican	June 5, 1896 – March 3, 1897	54th	Won contested election. Lost re-election.
William H. Hinrichsen (Jacksonville)	Democratic	March 4, 1897 – March 3, 1899	55th	Elected in 1896. Retired.
William E. Williams (Pittsfield)	Democratic	March 4, 1899 – March 3, 1901	56th	Elected in 1898. Retired.
Thomas J. Selby (Hardin)	Democratic	March 4, 1901 – March 3, 1903	57th	Elected in 1900. Retired.
Joseph V. Graff (Peoria)	Republican	March 4, 1903 – March 3, 1911	58th 59th 60th 61st	Redistricted from the14th district andre-elected in 1902. Re-elected in 1904. Re-elected in 1906. Re-elected in 1908. Lost re-election.	1903–1913 [data missing]
Claude U. Stone (Peoria)	Democratic	March 4, 1911 – March 3, 1917	62nd 63rd 64th	Elected in 1910. Re-elected in 1912. Re-elected in 1914. Lost re-election.
					1913–1923 [data missing]
Clifford C. Ireland (Peoria)	Republican	March 4, 1917 – March 3, 1923	65th 66th 67th	Elected in 1916. Re-elected in 1918. Re-elected in 1920. Lost renomination.
William E. Hull (Peoria)	Republican	March 4, 1923 – March 3, 1933	68th 69th 70th 71st 72nd	Elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Lost renomination.	1923–1933 [data missing]
Everett Dirksen (Pekin)	Republican	March 4, 1933 – January 3, 1949	73rd 74th 75th 76th 77th 78th 79th 80th	Elected in 1932. Re-elected in 1934. Re-elected in 1936. Re-elected in 1938. Re-elected in 1940. Re-elected in 1942. Re-elected in 1944. Re-elected in 1946. Retired.	1933–1943 [data missing]
					1943–1949 [data missing]
Leo E. Allen (Galena)	Republican	January 3, 1949 – January 3, 1961	81st 82nd 83rd 84th 85th 86th	Redistricted from the13th district andre-elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Re-elected in 1958. Retired.	1949–1953 [data missing]
					1953–1963 [data missing]
John B. Anderson (Rockford)	Republican	January 3, 1961 – January 3, 1981	87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th	Elected in 1960. Re-elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Re-elected in 1972. Re-elected in 1976. Re-elected in 1978. Retired torun for U.S. President.
					1963–1967 [data missing]
					1967–1973 [data missing]
					1973–1983 [data missing]
Lynn Morley Martin (Loves Park)	Republican	January 3, 1981 – January 3, 1991	97th 98th 99th 100th 101st	Elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Retired torun for U.S. Senator.
					1983–1993 [data missing]
John W. Cox Jr. (Galena)	Democratic	January 3, 1991 – January 3, 1993	102nd	Elected in 1990. Lost re-election.
Don Manzullo (Egan)	Republican	January 3, 1993 – January 3, 2013	103rd 104th 105th 106th 107th 108th 109th 110th 111th 112th	Elected in 1992. Re-elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000 Re-elected in 2002 Re-elected in 2004 Re-elected in 2006 Re-elected in 2008 Re-elected in 2010 Lost renomination.	1993–2003 [data missing]
					2003–2013
Adam Kinzinger (Channahon)	Republican	January 3, 2013 – January 3, 2023	113th 114th 115th 116th 117th	Redistricted from the11th district andre-elected in 2012. Re-elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Retired.	2013–2023
Darin LaHood (Peoria)	Republican	January 3, 2023 – present	118th 119th	Redistricted from the18th district andre-elected in 2022. Re-elected in 2024.	2023–present

• Illinois's congressional districts
• List of United States congressional districts

• Martis, Kenneth C. (1989).The Historical Atlas of Political Parties in the United States Congress. New York: Macmillan Publishing Company.
• Martis, Kenneth C. (1982).The Historical Atlas of United States Congressional Districts. New York: Macmillan Publishing Company.
• Congressional Biographical Directory of the United States 1774–present

• Washington Post page on the 16th District of Illinois
• U.S. Census Bureau - 16th District Fact SheetArchived July 17, 2011, at theWayback Machine

• Congressional districts of Illinois
• Boone County, Illinois
• Carroll County, Illinois
• DeKalb County, Illinois
• Jo Daviess County, Illinois
• McHenry County, Illinois
• Ogle County, Illinois
• Stephenson County, Illinois
• Whiteside County, Illinois
• Winnebago County, Illinois
• Constituencies established in 1873
• 1873 establishments in Illinois

• CS1: unfit URL
• Webarchive template wayback links
• Articles with short description
• Short description is different from Wikidata
• Use mdy dates from April 2021
• All articles with lists with data missing
• Data missing from August 2023
• Pages using the Kartographer extension