Illinois's 11th congressional district
Interactive map of district boundaries since January 3, 2023
Representative	Bill Foster D–Naperville
Area	928.6 sq mi (2,405 km2)
Distribution	99.7% urban 0.3% rural
Population (2023)	761,048
Median household income	$105,915[1]
Ethnicity	63.0% White 18.9% Hispanic 8.4% Asian 6.0% Black 3.4% Two or more races 0.5% other
Cook PVI	D+5[2]

The 11th congressional district of Illinois is represented by Democrat Bill Foster.

From 1865 to 1867, the district included Bureau, LaSalle, Livingston and Woodford counties.^[3] From 1901 until 1947 the 11th congressional district included Kane, DuPage, McHenry and Will Counties. Following the Congressional Apportionment Act of 1947, the district covered a portion of Cook County and the far northwest side of Chicago roughly centered on Norwood Park.^[4] The district was not changed by 1951's redistricting.^[5] In 1961, the district was widened westward to the Des Plaines River and east into parts of Lincoln Square.^[6] The district covered the northwest side of Chicago until the early 1990s when it moved closer to its current area, encompassing most of LaSalle and Grundy Counties, the southern part of Will County, the northern part of Kankakee County and a small portion of southeastern Cook County along the Indiana state line.^[7] The Illinois Congressional Reapportionment Act of 2001 (10 ILCS 76) defined its boundaries following the 2000 U.S. census.

Following the 2010 U.S. census the district includes Joliet in Will County, parts of Naperville in southern DuPage County, and Aurora in Kane County. It includes the Argonne National Laboratory. The congressional district covers parts of Cook, Du Page, Kane, Kendall and Will counties, as of the 2011 redistricting which followed the 2010 census. All or parts of Aurora, Bolingbrook, Darien, Joliet, Montgomery, Naperville, Lisle, Downers Grove, New Lenox, Shorewood and Woodridge are included.^[8] The representatives for these districts were elected in the 2012 primary and general elections, and the boundaries became effective on January 3, 2013.

• Aurora – 180,542
• Naperville – 149,540
• Elgin – 114,797
• Bolingbrook – 73,922
• Downers Grove – 50,247
• Crystal Lake – 40,269
• Romeoville – 39,863
• Woodridge – 34,158
• St. Charles – 33,081
• Algonquin – 29,700
• Lake in the Hills – 28,982
• Huntley – 28,008
• McHenry – 27,135
• Batavia – 26,098
• Woodstock – 25,630
• Belvidere – 25,339
• Lisle – 24,223
• Darien – 22,011
• Geneva – 21,393
• North Aurora – 18,261
• Lemont – 17,629
• Wauconda – 14,084
• Warrenville – 13,553
• Burr Ridge – 11,192
• Campton Hills – 10,885
• Pingree Grove – 10,365

• Sugar Grove – 9,278
• Hampshire – 7,667
• Marengo – 7,568
• Lakemoor – 6,182
• Elburn – 6,175
• Volo – 6,122
• Willow Springs – 5,857
• Genoa – 5,298
• Island Lake – 5,201
• Poplar Grove – 5,049
• Palos Park – 4,899
• Lakewood – 4,283

As of the 2020 redistricting, this district will shift to cover the Northern Illinois region, encompassing most of McHenry and Kane Counties, parts of Boone, Lake, DeKalb, DuPage, Cook, and Will Counties.

Lake County is split between this district, the 9th district, and the 10th district. They are partitioned by Volo Bog State Natural Area, W Brandenburg Rd, N US Highway 12, W Townline Rd, N Wilson Rd, W Chardon Rd, N Fairfield Rd, W Ivanhoe Rd, Liberty St, High St, Kimball Ave, E Liberty St, S Church St, Bangs St, W Liberty St, Westridge Dr/N Lakeview Cir, Carriage Hill Ct/Wood Creek Dr, Greenleaf Ave, Ridge Rd/Burr Oak Ln, and E Burnett Rd/Northern Ter. The 11th district takes in the villages of Wauconda and Island Lake (shared with McHenry County); and part of Lakemoor (shared with McHenry County) and Volo.

McHenry County is split between this district, the 10th district, the 16th district, and the 9th district. The 11th and 10th districts are partitioned by Lily Lake Drain, W Rand Rd, Fox River, N Riverside Dr, Illinois Highway 31, Petersen Farm, Dutch Creek, McCullom Lake Rd, White Oak Ln, McCullom Lake, W Shore Dr, W Martin Rd, Bennington Ln, N Martin Rd, N Curran Rd, Old Draper Rd, Farmstead Dr, S Ridge Rd, N Valley Hill Rd, Barber Creek, Wonder Lake, Illinois Highway 120, Thompson Rd, and Slough Creek. The 11th and 16th districts are partitioned by Nelson Rd, Slough Creek, Hartland Rd, and Tomlin Rd. The 11th and 9th districts are partitioned by E Crystal Lake Ave, Meridian Ln, Crystal Lake Country Club, Woodscreek Park, Boulder Ridge Country Club, and Fairway View Dr. The 11th district takes in the communities of Woodstock, Marengo, Riley, Franklinville, Union, Coral, Harmony, Lakewood, Bull Valley, Ridgefield, Prairie Grove, Oakwood Hills, Burtons Bridge, and Holiday Hills; most of McHenry; half of Crystal Lake and Huntley (shared with Kane County); and part of Port Barrington, Lake in the Hills, Algonquin, Hartland, McCullom Lake, Island Lake (shared with Lake County), and Lakemoor (shared with Lake County)

Boone County is split between this district and the 16th 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 of Garden Prairie; half of the municipality of Belvidere; and part of Poplar Grove.

DeKalb County is split between this district, the 14th district, and the 16th district. They are partitioned by Myelle Rd, Bass Line Rd, Illinois Highway 23, Whipple Rd, Plank Rd, Swanson Rd, and Darnell Rd. The 11th district takes in the municipalities of Genoa and Kingston.

Kane County is split between this district and the 8th district. The 11th and 8th districts are partitioned by Illinois Highway 47, Regency Parkway, Farm Hill Dr, Del Webb Blvd, Jane Adams Memorial Tollway, Sandwald Rd, Ridgecrest Dr, Brier Hill Rd/Illinois Highway 47, Coombs Rd, Shadow Hill Dr, Campton Hills Dr, West Main St, South Tyler Rd, Division St, Fox River, North Washington Ave, Douglas Rd, Orion Rd, and East Fabyan Parkway. The 11th and 14th districts are partitioned by Lasher Rd, Illinois Highway 83, Jericho Rd, Arnold Ave, Rathbone Ave, Fox River, and New York St. The 11th district takes in the municipalities of North Aurora, Batavia, Kaneville, Elburn, Virgil, Lily Lake, Campton Hills, and Burlington; most of Hampshire; most of Geneva west of the Fox River; southern Pingree Grove; half of St. Charles, Aurora, and Huntley (shared with McHenry County); and part of Sugar Grove, Maple Park, and Elgin.

DuPage County is split between this district, the 6th district, and the 3rd district. The 11th, 3rd, and 6th districts are partitioned by Grand Ave, Highway 83, Central Ave, Fullerton Ave, Harvard Ave, Armitage Ave, Addison Rd, Highway 64, Westmore Ave, Plymouth St, Westwood Ave, Highway 355, Union Pacific Railroad, North Path, President St, Naperville Rd, Highway 23, Danada Ct, Arrowhead Golf Club, Herrick Rd, Galosh Ave, Butterfield Rd, Calumet Ave E, and Prairie Ave. The 11th district takes in the village of Woodridge; most of Naperville; half of Lemont (shared with Cook and Will counties); and part of Burr Ridge (shared with Cook County), Darien, Downers Grove, Lisle, and Warrenville.

Cook County is split between this district and the 1st district. The 11th and 1st districts are partitioned by W Roberta Dr, Walter St, W 127th St, Glenys Dr/Norwalk Rd, Glenys Dr/Keepataw Dr, Hillview Dr, Woodglen Ln/Berkeley Ln, Country Ln/Auburn Rd, 6th St/Kromray Rd, 119th St, Mt Vernon Memorial Estates, and McCarthy Rd. The 11th district takes in the village of Willow Springs; half of Lemont (shared with DuPage and Will counties); and part of Burr Ridge (shared with DuPage County) and Palos Park.

Will County is split between this district and the 14th district. They are partitioned by Modaff Rd, Knoch Knolls Park, S Knight Rd, Kings Rd, Remington Blvd, The Links at Carillon, N Weber Rd, W Normantown Rd, Romeoville Prairie Nature Preserve, and the Chicago Sanitary and Ship Canal. The 11th district takes in most of the village of Bolingbrook and half of Lemont (shared with Cook and DuPage counties) and Romeoville.

This table indicates how the district has voted in U.S. presidential elections; election results reflect voting in the district as it was configured at the time of the election, not as it is configured today.

This table indicates how the district has voted in recent statewide elections; election results reflect voting in the district as it is currently configured, not necessarily as it was at the time of these elections.

Member	Party	Years	Cong ress	Notes	District location
District created March 4, 1863
James C. Robinson (Marshall)	Democratic	March 4, 1863 – March 3, 1865	38th	Redistricted from the 7th district and re-elected in 1862. Retired to run for Governor of Illinois.
Samuel S. Marshall (McLeansboro)	Democratic	March 4, 1865 – March 3, 1873	39th 40th 41st 42nd	Elected in 1864. Re-elected in 1866. Re-elected in 1868. Re-elected in 1870. Redistricted to the 19th district.
Robert M. Knapp (Jerseyville)	Democratic	March 4, 1873 – March 3, 1875	43rd	Elected in 1872. Retired.
Scott Wike (Pittsfield)	Democratic	March 4, 1875 – March 3, 1877	44th	Elected in 1874. Retired.
Robert M. Knapp (Jerseyville)	Democratic	March 4, 1877 – March 3, 1879	45th	Elected again in 1876. Retired.
James W. Singleton (Quincy)	Democratic	March 4, 1879 – March 3, 1883	46th 47th	Elected in 1878. Re-elected in 1880. Redistricted to the 12th district.
William Neece (Macomb)	Democratic	March 4, 1883 – March 3, 1887	48th 49th	Elected in 1882. Re-elected in 1884. Lost re-election.
William Gest (Rock Island)	Republican	March 4, 1887 – March 3, 1891	50th 51st	Elected in 1886. Re-elected in 1888. Lost re-election.
Benjamin T. Cable (Rock Island)	Democratic	March 4, 1891 – March 3, 1893	52nd	Elected in 1890. Retired.
Benjamin F. Marsh (Warsaw)	Republican	March 4, 1893 – March 3, 1895	53rd	Redistricted from the 10th district and re-elected in 1892. Redistricted to the 15th district.
Walter Reeves (Streator)	Republican	March 4, 1895 – March 3, 1903	54th 55th 56th 57th	Elected in 1894. Re-elected in 1896. Re-elected in 1898. Re-elected in 1900. Retired.	1895–1903 Bureau, LaSalle, Livingston and Woodford counties
Howard M. Snapp (Joliet)	Republican	March 4, 1903 – March 3, 1911	58th 59th 60th 61st	Elected in 1902. Re-elected in 1904. Re-elected in 1906. Re-elected in 1908. Retired.	1903–1949 Kane, DuPage, McHenry and Will counties
Ira C. Copley (Aurora)	Republican	March 4, 1911 – March 3, 1915	62nd 63rd 64th 65th 66th 67th	Elected in 1910. Re-elected in 1912. Re-elected in 1914. Re-elected in 1916. Re-elected in 1918. Re-elected in 1920. Retired.
	Progressive	March 4, 1915 – March 3, 1917
	Republican	March 4, 1917 – March 3, 1923
Frank Reid (Aurora)	Republican	March 4, 1923 – January 3, 1935	68th 69th 70th 71st 72nd 73rd	Elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Re-elected in 1930. Re-elected in 1932. Retired.
Chauncey Reed (West Chicago)	Republican	January 3, 1935 – January 3, 1949	74th 75th 76th 77th 78th 79th 80th	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. Redistricted to the 14th district.
Chester Chesney (Chicago)	Democratic	January 3, 1949 – January 3, 1951	81st	Elected in 1948. Lost re-election.
Timothy P. Sheehan (Chicago)	Republican	January 3, 1951 – January 3, 1959	82nd 83rd 84th 85th	Elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Lost re-election.
Roman Pucinski (Chicago)	Democratic	January 3, 1959 – January 3, 1973	86th 87th 88th 89th 90th 91st 92nd	Elected in 1958. Re-elected in 1960. Re-elected in 1962. Re-elected in 1964. Re-elected in 1966. Re-elected in 1968. Re-elected in 1970. Retired to run for U.S. Senator.
Frank Annunzio (Chicago)	Democratic	January 3, 1973 – January 3, 1993	93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd	Redistricted from the 7th district and re-elected in 1972. Re-elected in 1974. Re-elected in 1976. Re-elected in 1978. Re-elected in 1980. Re-elected in 1982. Re-elected in 1984. Re-elected in 1986. Re-elected in 1988. Re-elected in 1990. Retired.
George E. Sangmeister (Mokena)	Democratic	January 3, 1993 – January 3, 1995	103rd	Redistricted from the 4th district and re-elected in 1992. Retired.
Jerry Weller (Morris)	Republican	January 3, 1995 – January 3, 2009	104th 105th 106th 107th 108th 109th 110th	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. Retired.
					2003–2013
Debbie Halvorson (Crete)	Democratic	January 3, 2009 – January 3, 2011	111th	Elected in 2008. Lost re-election.
Adam Kinzinger (Manteno)	Republican	January 3, 2011 – January 3, 2013	112th	Elected in 2010. Redistricted to the 16th district.
Bill Foster (Naperville)	Democratic	January 3, 2013 – present	113th 114th 115th 116th 117th 118th	Elected in 2012. Re-elected in 2014. Re-elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024.	2013–2023
					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

• 2002 Census of Agriculture – 11th Congressional District Profile
• District map
• Congressional district profiles
• Washington Post page on the 11th District of Illinois
• U.S. Census Bureau – 11th District Fact Sheet Archived September 28, 2011, at the Wayback Machine
• Maps
  • Illinois Districts in 1903. (1901 to 1947)^{[permanent dead link‍]}
  • Illinois Districts following the Congressional Apportionment Act of 1947.^{[permanent dead link‍]}
  • Illinois Districts following the Congressional Apportionment Act of 1951.^{[permanent dead link‍]}
  • Illinois Districts following the Congressional Apportionment Act of 1961.^{[permanent dead link‍]}

41°38′34″N 88°08′45″W / 41.64278°N 88.14583°W / 41.64278; -88.14583