Illinois's 6th Congressional District

Illinois's 6th Congressional District is represented by Sean Casten (Democrat), who has held the seat since 2019. Casten has an overall VoteSee report card grade of C, voted in 99% of roll-call votes on bills this Congress, and votes with the Democratic majority 97% of the time. The district includes Chicago, Oak Lawn, and Downers Grove. It takes in all or part of 2 counties, and 58% of residents live in Cook County. About 748,000 people live in the district, and the median household income is $99,953.

Current Representative

Sean Casten (Democrat) has represented Illinois's 6th Congressional District since 2019.

VoteSee report card grade: C
Attendance in the 119th Congress: 99% of roll-call votes on bills
Votes with the Democrat majority: 97%

See Sean Casten's full voting record and issue positions →

2026 Election

U.S. House: Illinois 6th District

Winner: Sean Casten.

Incumbent Sean Casten is running for re-election. 2 candidates were on the Nov 3, 2026 ballot.

Sean Casten (Democratic), incumbent: raised $2.5M, $1.0M cash on hand; VoteSee report card C; 99% attendance; votes with the Democratic majority 97% of the time
Niki Conforti (Republican): raised $348K, $8K cash on hand

Polls: No public polls

See the full 2026 race →

District Demographics

Population: 747,517
Median household income: $99,953
Median age: 41
Median home value: $341,500
Bachelor's degree or higher: 44.2%

Source: American Community Survey 2020–2024 5-year estimates, 119th Congress boundaries.

How Casten Voted Recently

Yea on American Enrichment Deployment Act (Nov 9, 2026) — Passed
Yea on Nuclear REFUEL (Recycling Efficient Fuels Utilizing Expedited Licensing) Act (Nov 9, 2026) — Passed
Yea on Retire through Ownership Act (Sep 16, 2026) — Passed
Yea on Water Resources Development Act of 2026 (Sep 16, 2026) — Passed
Yea on Ratepayer Protection Act (Sep 16, 2026) — Passed

Breaks with the Democrat majority

Nay on National Fraud Enforcement Division Act of 2026 (Sep 16, 2026) — Passed
No on National Security, Department of State, and Related Programs Appropriations Act, 2027 (Jul 15, 2026) — Failed
Nay on AI Warnings And Resources for Education Act (Jun 29, 2026) — Passed

Who Held This Seat Before

Members of Congress who previously represented Illinois's 6th Congressional District. District lines are redrawn after each census, so earlier members may have represented a different area under this number.

Peter Roskam — Republican (2007–2019)
Henry Hyde — Republican (1975–2007)
Harold Collier — Republican (1973–1975)
George Collins — Democrat (1970–1972)
Daniel Ronan — Democrat (1965–1969)
Thomas O’Brien — Democrat (1943–1965)
Anton Maciejewski — Democrat (1939–1943)
Thomas O’Brien — Democrat (1933–1939)
James Igoe — Democrat (1927–1933)
John Gorman — Republican (1925–1927)
James Buckley — Democrat (1923–1925)
John Gorman — Republican (1921–1923)

Where the District Is

Illinois's 6th Congressional District covers 225 square miles of land. Boundaries are for the current (119th) Congress.

Counties

Cook County (part): 58% of residents
DuPage County (part): 42% of residents

Largest communities

Chicago (part)
Oak Lawn (part)
Downers Grove (part)
Orland Park (part)
Lombard (part)
Tinley Park (part)
Elmhurst (part)
Westmont