Illinois’s 6th District

U.S. House · IL-6

Election day November 3, 2026 · forecast of October 15, 2026

Our forecast gives the Democrats a more than 99% chance of winning, with an average lead of 19.7 points.

Safe seat. Chance of a final gap under 5 points: 2%.

Projected vote share

Projection by party

Thin vertical mark: 2024 result.

	Democrat	Republican
IL-6	59.8%	40.2%
National averageUnited States	54.5%+5.3	44.2%−4.1

Simple average of the 435 districts, not weighted by population.

Projection track

Latino citizens aged 18 and over	12.2% (± 0.5)

Share of all citizens aged 18 and over (ACS 2020–2024 estimate). Not a share of registered or actual voters.

Source: U.S. Census Bureau, citizen voting-age population by race and ethnicity, ACS 2020–2024, 119th Congress districts

Sean Casten · Democrat

Held March 17, 2026 · Official source

Democratic primary	Sean Casten	75.8%	69,579 votes
Republican primary	Niki Conforti	82.2%	26,783 votes

Who's running

Candidates for the upcoming election.

The Democrats won by 8.4 points.

Our current projection: the Democrats ahead by 19.7 points.

Party ahead and how sure the projection is.

Watch list

The smallest projected gaps between the top two.