# Illinois's 8th congressional district

The 8th congressional district of Illinois is a congressional district in the U.S. state of Illinois that has been represented by Democrat Raja Krishnamoorthi since 2017.

## History
### 2011 redistricting

The congressional district covers parts of Cook County, DuPage County and Kane County, as of the 2011 redistricting which followed the 2010 United States census. All or parts of Addison, Arlington Heights, Barrington Hills, Bloomingdale, Carol Stream, Carpentersville, East Dundee, Elgin, Elk Grove Village, Glendale Heights, Hanover Park, Hoffman Estates, Lombard, Palatine, Rolling Meadows, Roselle, Schaumburg, South Elgin, Streamwood, Villa Park and Wood Dale are included. These boundaries became effective on January 3, 2013.

## Composition

| # | County | Seat | Population |
| 31 | Cook | Chicago | 5,087,072 |
| 43 | DuPage | Wheaton | 921,213 |
| 89 | Kane | Geneva | 514,982 |

### Cities and CDPS with 10,000 or more people

* Chicago – 2,665,039
* Elgin – 114,797
* Schaumburg – 78,723
* Arlington Heights – 77,676
* Palatine – 67,908
* Des Plaines – 60,675
* Mount Prospect – 56,852
* Hoffman Estates – 52,530
* Barlett – 41,105
* Carol Stream – 39,854
* Streamwood – 39,577
* Carpentersville – 39,983
* Hanover Park – 37,470
* Addison – 35,702
* Glendale Heights – 33,176
* St. Charles – 33,081
* Elk Grove Village – 32,812
* Algonquin – 29,700
* Glen Ellyn – 28,846
* Huntley – 28,008
* Batavia – 26,098
* Rolling Meadows – 24,200
* South Elgin – 23,865
* Roselle – 22,897
* Bloomingdale – 22,382
* Geneva – 21,393
* Norridge – 15,251
* Wood Dale – 14,012
* Pingree Grove – 10,365

### 2,5000 – 10,000 people

* Itasca – 9,543
* Gilberts – 8,366
* West Dundee – 7,686
* Hampshire – 7,667
* Inverness – 7,616
* South Barrington – 5,077
* Barrington Hills – 4,114
* Rosemont – 3,952
* Sleepy Hollow – 3,214
* East Dundee – 3,152
As of the 2020 redistricting, this district will still be based partially in northern Cook County, and now parts of northern DuPage County and northeast Kane County, as well as part of the Chicago neighborhood of O'Hare.
The 8th district takes in the Cook County communities of Schaumburg (shared with DuPage County), Rosemont, Rolling Meadows, South Barrington, and East Dundee (shared with Kane County); most of Hoffman Estates, Streamwood, and Elgin (shared with Kane County); half of Des Plaines; the majority of Elk Grove Village west of Tome Rd (shared with DuPage County); part of Palatine, Norridge, Rosemont, Arlington Heights, Hanover Park (shared with DuPage County), and Inverness; and part of Mount Prospect between Dempster St and W Lonnquist Blvd.
DuPage County is split between this district and the 3rd district. They are partitioned by Bartlett Rd, Old Wayne Golf Course, St Charles Rd, Fair Oaks Rd, Timber Ln, Woodcreek Ln N, Wayne Oaks Dam Reservoir, Morton Rd, Pawnee Dr, County Farm Rd, Highway 64, Gary Ave Della Ave, West St, Geneva Rd, Bloomingdale's Rd, Glendale Lakes Golf Club, President St, Gilberto St, Schubert Ave, Opal Ave, Stevenson Dr, Highway 4, Polo Club Dr, Canadian National Railway, East Branch Park, Army Trail Rd, Belmont Pl, Addison Trail High School, Woodland Ave, 7th Ave, Lake St, 3rd Ave, Eggerding Dr, Mill Rd, Highway 290, Addison Rd, Oak Meadows Golf & Banquets, Central Ave, Canadian Pacific Railway, Wood Dale Rd, Elmhurt St, and Lively Blvd. The 8th district takes in the communities of Bloomingdale, Schaumburg (shared with Cook County), Roselle, and Itasca; most of Carol Stream; the majority of Elk Grove Village west of Tome Rd (shared with DuPage County); part of Hanover Park (shared with Cook County); eastern Bartlett; western Wood Dale; northwestern Addison; part of Glen Ellyn; and part of northern Glendale Heights.
Kane County is split between this district and the 11th district. They 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 8th district takes in the communities of East Dundee (shared with Cook County), West Dundee, Carpentersville, Sleepy Hollow, South Elgin, Gilberts, Pingree Grove; most of Elgin (shared with Cook County); half of St. Charles; southern Algonquin; western Wayne and Barrington Hills; eastern Hampshire; southeastern Huntley; a portion of Geneva east of the Fox River; and part of Batavia.

## Recent election results from statewide races

| Year | Office | Results |
| 2008 | President | Obama 59% - 40% |
| 2012 | President | Obama 55% - 45% |
| 2016 | President | Clinton 55% - 39% |
| 2016 | Senate | Duckworth 52% - 42% |
| 2016 | Comptroller (Spec.) | Munger 48% - 45% |
| 2018 | Governor | Pritzker 51% - 43% |
| 2018 | Attorney General | Raoul 53% - 44% |
| 2018 | Secretary of State | White 66% - 31% |
| 2018 | Comptroller | Mendoza 58% - 39% |
| 2018 | Treasurer | Frerichs 54% - 42% |
| 2020 | President | Biden 57% - 41% |
| 2020 | Senate | Durbin 55% - 40% |
| 2022 | Senate | Duckworth 56% - 42% |
| 2022 | Governor | Pritzker 55% - 42% |
| 2022 | Attorney General | Raoul 55% - 43% |
| 2022 | Secretary of State | Giannoulias 55% - 43% |
| 2022 | Comptroller | Mendoza 56% - 42% |
| 2022 | Treasurer | Frerichs 53% - 44% |
| 2024 | President | Harris 53% - 46% |

## List of members representing the district

| Name | Party | Years | Cong– ress | Electoral history | Counties |
| District created March 4, 1853. ||||||
| William Henry Bissell (Belleville) | Independent Democratic | March 4, 1853 – March 3, 1855 | 33rd | Redistricted from the 1st district and re-elected in 1852. Retired. | 1853–1863 [data missing] |
| Vacant | Vacant | March 4, 1855 – November 4, 1856 | 34th | Representative-elect Lyman Trumbull was elected to the U.S. Senate on February 8, 1855. | 1853–1863 [data missing] |
| James L. D. Morrison (McLeansboro) | Democratic | November 4, 1856 – March 3, 1857 | 34th | Elected to finish Trumbull's term. Retired. | 1853–1863 [data missing] |
| Robert Smith (Alton) | Democratic | March 4, 1857 – March 3, 1859 | 35th | Elected in 1856. Lost renomination. | 1853–1863 [data missing] |
| Philip B. Fouke (Belleville) | Democratic | March 4, 1859 – March 3, 1863 | 36th 37th | Elected in 1858. Re-elected in 1860. Retired. | 1853–1863 [data missing] |
| John T. Stuart (Springfield) | Democratic | March 4, 1863 – March 3, 1865 | 38th | Elected in 1862. Lost re-election. | 1863–1873 DeWitt, Livingston, Logan, McLean, Sangamon, Tazewell, and Woodford |
| Shelby Moore Cullom (Springfield) | Republican | March 4, 1865 – March 3, 1871 | 39th 40th 41st | Elected in 1864. Re-elected in 1866. Re-elected in 1868. Retired. | 1863–1873 DeWitt, Livingston, Logan, McLean, Sangamon, Tazewell, and Woodford |
| James Carroll Robinson (Springfield) | Democratic | March 4, 1871 – March 3, 1873 | 42nd | Elected in 1870. Redistricted to the 12th district. | 1863–1873 DeWitt, Livingston, Logan, McLean, Sangamon, Tazewell, and Woodford |
| Greenbury L. Fort (Lacon) | Republican | March 4, 1873 – March 3, 1881 | 43rd 44th 45th 46th | Elected in 1872. Re-elected in 1874. Re-elected in 1876. Re-elected in 1878. Retired. | 1873–1883 Ford, Iroquois, Kankakee, Livingston, Marshall, and Woodford |
| Lewis E. Payson (Pontiac) | Republican | March 4, 1881 – March 3, 1883 | 47th | Elected in 1880. Redistricted to the 9th district. | 1873–1883 Ford, Iroquois, Kankakee, Livingston, Marshall, and Woodford |
| William Cullen (Ottawa) | Republican | March 4, 1883 – March 3, 1885 | 48th | Redistricted from the 7th district and re-elected in 1882. Lost renomination. | 1883–1895 DuPage, Grundy, Kendall, LaSalle, and Will |
| Ralph Plumb (Streator) | Republican | March 4, 1885 – March 3, 1889 | 49th 50th | Elected in 1884. Re-elected in 1886. Retired. | 1883–1895 DuPage, Grundy, Kendall, LaSalle, and Will |
| Charles A. Hill (Joliet) | Republican | March 4, 1889 – March 3, 1891 | 51st | Elected in 1888. Lost re-election. | 1883–1895 DuPage, Grundy, Kendall, LaSalle, and Will |
| Lewis Steward (Plano) | Democratic | March 4, 1891 – March 3, 1893 | 52nd | Elected in 1890. Lost re-election. | 1883–1895 DuPage, Grundy, Kendall, LaSalle, and Will |
| Robert A. Childs (Hinsdale) | Republican | March 4, 1893 – March 3, 1895 | 53rd | Elected in 1892. Retired. | 1883–1895 DuPage, Grundy, Kendall, LaSalle, and Will |
| Albert J. Hopkins (Aurora) | Republican | March 4, 1895 – March 3, 1903 | 54th 55th 56th 57th | Redistricted from the 5th district and re-elected in 1894. Re-elected in 1896. Re-elected in 1898. Re-elected in 1900. Retired to run for U.S. senator. | 1895–1903 DeKalb, DuPage, Grundy, Kane, Kendall, and McHenry |
| William F. Mahoney (Chicago) | Democratic | March 4, 1903 – December 27, 1904 | 58th | Redistricted from the 5th district and re-elected in 1902. Died. | 1903–1913 Cook |
| Vacant | Vacant | December 27, 1904 – March 3, 1905 | 58th | | 1903–1913 Cook |
| Charles McGavin (Chicago) | Republican | March 4, 1905 – March 3, 1909 | 59th 60th | Elected in 1904. Re-elected in 1906. Retired. | 1903–1913 Cook |
| Thomas Gallagher (Chicago) | Democratic | March 4, 1909 – March 3, 1921 | 61st 62nd 63rd 64th 65th 66th | Elected in 1908. Re-elected in 1910. Re-elected in 1912. Re-elected in 1914. Re-elected in 1916. Re-elected in 1918. Retired. | 1903–1913 Cook |
| Thomas Gallagher (Chicago) | Democratic | March 4, 1909 – March 3, 1921 | 61st 62nd 63rd 64th 65th 66th | Elected in 1908. Re-elected in 1910. Re-elected in 1912. Re-elected in 1914. Re-elected in 1916. Re-elected in 1918. Retired. | 1913–1949 Cook |
| Stanley H. Kunz (Chicago) | Democratic | March 4, 1921 – March 3, 1931 | 67th 68th 69th 70th 71st | Elected in 1920. Re-elected in 1922. Re-elected in 1924. Re-elected in 1926. Re-elected in 1928. Lost re-election. | 1913–1949 Cook |
| Peter C. Granata (Chicago) | Republican | March 4, 1931 – April 5, 1932 | 72nd | Lost contested election. | 1913–1949 Cook |
| Stanley H. Kunz (Chicago) | Democratic | April 5, 1932 – March 3, 1933 | 72nd | Won contested election. Lost renomination. | 1913–1949 Cook |
| Leo Kocialkowski (Chicago) | Democratic | March 4, 1933 – January 3, 1943 | 73rd 74th 75th 76th 77th | Elected in 1932. Re-elected in 1934. Re-elected in 1936. Re-elected in 1938. Re-elected in 1940. Lost renomination. | 1913–1949 Cook |
| Thomas S. Gordon (Chicago) | Democratic | January 3, 1943 – January 3, 1959 | 78th 79th 80th 81st 82nd 83rd 84th 85th | Elected in 1942. Re-elected in 1944. Re-elected in 1946. Re-elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Retired. | 1913–1949 Cook |
| Thomas S. Gordon (Chicago) | Democratic | January 3, 1943 – January 3, 1959 | 78th 79th 80th 81st 82nd 83rd 84th 85th | Elected in 1942. Re-elected in 1944. Re-elected in 1946. Re-elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Retired. | 1949–1953 Cook |
| Thomas S. Gordon (Chicago) | Democratic | January 3, 1943 – January 3, 1959 | 78th 79th 80th 81st 82nd 83rd 84th 85th | Elected in 1942. Re-elected in 1944. Re-elected in 1946. Re-elected in 1948. Re-elected in 1950. Re-elected in 1952. Re-elected in 1954. Re-elected in 1956. Retired. | 1953–1963 Cook |
| Dan Rostenkowski (Chicago) | Democratic | January 3, 1959 – January 3, 1993 | 86th 87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd | 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. 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. Redistricted to the 5th district. | 1953–1963 Cook |
| Dan Rostenkowski (Chicago) | Democratic | January 3, 1959 – January 3, 1993 | 86th 87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd | 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. 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. Redistricted to the 5th district. | 1963–1967 Cook |
| Dan Rostenkowski (Chicago) | Democratic | January 3, 1959 – January 3, 1993 | 86th 87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd | 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. 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. Redistricted to the 5th district. | 1967–1973 Cook |
| Dan Rostenkowski (Chicago) | Democratic | January 3, 1959 – January 3, 1993 | 86th 87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd | 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. 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. Redistricted to the 5th district. | 1973–1983 Cook |
| Dan Rostenkowski (Chicago) | Democratic | January 3, 1959 – January 3, 1993 | 86th 87th 88th 89th 90th 91st 92nd 93rd 94th 95th 96th 97th 98th 99th 100th 101st 102nd | 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. 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. Redistricted to the 5th district. | 1983–1993 Cook |
| Phil Crane (Wauconda) | Republican | January 3, 1993 – January 3, 2005 | 103rd 104th 105th 106th 107th 108th | Redistricted from the 12th district and re-elected in 1992. Re-elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Lost re-election. | 1993–2003 Cook and Lake |
| Phil Crane (Wauconda) | Republican | January 3, 1993 – January 3, 2005 | 103rd 104th 105th 106th 107th 108th | Redistricted from the 12th district and re-elected in 1992. Re-elected in 1994. Re-elected in 1996. Re-elected in 1998. Re-elected in 2000. Re-elected in 2002. Lost re-election. | 2003–2013 Cook, Lake, and McHenry |
| Melissa Bean (Barrington) | Democratic | January 3, 2005 – January 3, 2011 | 109th 110th 111th | Elected in 2004. Re-elected in 2006. Re-elected in 2008. Lost re-election. | 2003–2013 Cook, Lake, and McHenry |
| Joe Walsh (McHenry) | Republican | January 3, 2011 – January 3, 2013 | 112th | Elected in 2010. Lost re-election. | 2003–2013 Cook, Lake, and McHenry |
| Tammy Duckworth (Hoffman Estates) | Democratic | January 3, 2013 – January 3, 2017 | 113th 114th | Elected in 2012. Re-elected in 2014. Retired to run for U.S. senator. | 2013–2023 Cook, DuPage, and Kane |
| Raja Krishnamoorthi (Schaumburg) | Democratic | January 3, 2017 – present | 115th 116th 117th 118th 119th | Elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024. | 2013–2023 Cook, DuPage, and Kane |
| Raja Krishnamoorthi (Schaumburg) | Democratic | January 3, 2017 – present | 115th 116th 117th 118th 119th | Elected in 2016. Re-elected in 2018. Re-elected in 2020. Re-elected in 2022. Re-elected in 2024. | 2023–present Cook, DuPage, and Kane |

## Elections
### 2012 election

Incumbent Representative Joe Walsh was drawn out of the district for 2012 by 2011 redistricting, although a candidate is not required to live in the district to be eligible to run for a seat in Congress. Democrat Raja Krishnamoorthi of Hoffman Estates announced his candidacy for the seat in late May 2011. In July 2011, Democrat Tammy Duckworth also announced plans to run for the seat. Duckworth won the Democratic nomination on March 20, 2012. Duckworth defeated Walsh in the general election on November 6, 2012.
Illinois's 8th congressional district, 2012 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tammy Duckworth | 123,206 | 54.7 |
| | Republican | Joe Walsh (incumbent) | 101,860 | 45.3 |
| Total votes | Total votes | Total votes | 225,066 | 100.0 |
| | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican | Democratic gain from Republican |

### 2014

Illinois's 8th congressional district, 2014 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Tammy Duckworth (incumbent) | 84,178 | 55.7 |
| | Republican | Larry Kaifesh | 66,878 | 44.3 |
| Total votes | Total votes | Total votes | 151,056 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2016

Illinois's 8th congressional district, 2016 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Raja Krishnamoorthi | 144,954 | 58.3 |
| | Republican | Pete DiCianni | 103,617 | 41.7 |
| Total votes | Total votes | Total votes | 248,571 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2018

Illinois's 8th congressional district, 2018 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Raja Krishnamoorthi (incumbent) | 130,054 | 66.0 |
| | Republican | Jitendra "JD" Diganvker | 67,073 | 34.0 |
| Total votes | Total votes | Total votes | 197,127 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2020

Illinois's 8th congressional district, 2020 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Raja Krishnamoorthi (incumbent) | 186,251 | 73.16 | +7.19% |
| | Libertarian | Preston Gabriel Nelson | 68,327 | 26.84 | N/A |
| Total votes | Total votes | Total votes | 254,578 | 100.0 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2022

Illinois's 8th congressional district, 2022 :
| Party | Party | Candidate | Votes | % |
| | Democratic | Raja Krishnamoorthi (incumbent) | 117,880 | 56.89 |
| | Republican | Chris Dargis | 89,335 | 43.11 |
| Total votes | Total votes | Total votes | 207,215 | 100.0 |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold |

### 2024

Illinois's 8th congressional district, 2024 :
| Party | Party | Candidate | Votes | % | ±% |
| | Democratic | Raja Krishnamoorthi (incumbent) | 172,920 | 57.06 | +0.17% |
| | Republican | Mark Rice | 130,153 | 42.94 | −0.17% |
| Total votes | Total votes | Total votes | 303,073 | 100.0 | |
| | Democratic hold | Democratic hold | Democratic hold | Democratic hold | Democratic hold |