2026 results · Illinois · Illinois 11th District
Bill Foster, the Democrat, wins re-election in Illinois's 11th District
Kamala Harris carried the district by 11.3 points in 2024; this year's count is a 17.2-point move toward the Democrats.
| Candidate | Votes | Share | Share of the vote |
|---|---|---|---|
| Bill FosterDemocrat, incumbent | 170,915 | 64.3% | |
| Jeffrey WalterRepublican | 94,986 | 35.7% |
Called by Call the Map, Nov 4, 10:46 AM EST · 95% counted.
About 95% of the expected vote counted265,901 votesCount last changed Nov 7, 1:02 PM EST · checked Nov 7, 5:00 PM ESTSource: the official state and county counts, gathered by civicAPI
The map
Loading the map.
About the seat
Illinois's 11th District takes in all or part of 8 counties. The Democrats held it before this election. Its voters went D+11.3 for president in 2024. Its move from that vote, 17.2 points toward the Democrats, ranks 7 of 17 among the state's districts, counting from the largest move toward the Democrats.
- 2024 president
- D+11.3
- 2024 House race, same lines
- D+11.2
- Move from 2024, rank in state
- 7 of 17
- DuPage County30%
- Kane County30%
- McHenry County22%
- Will County10%
- Lake County3%
- Boone County3%
- Cook County1%
- DeKalb County1%
Shares are of the votes counted this year. The 2024 House figure is the same district, on the same lines.
What the count shows
Added together, the 8 counties compared moved 17.2 points toward the Democrats from the 2024 presidential vote.
The counties compared cast 73% as many votes as in 2024, from 76% in DuPage County to 59% in DeKalb County.
Will County moved most: D+29.2 for president in 2024, D+49.9 this year
The 8 counties with the largest moves from the 2024 presidential vote, among those with 2,000 or more votes for president in 2024 and a quarter of that counted. Each line runs from the 2024 margin to this year’s.
2024 president 2026
McHenry County added 11,482 net votes for Foster against the 2024 margin, 33% of the district's change
Across the 8 counties compared, the margin moved by 34,568 votes toward Foster: this year’s lead in votes against the 2024 presidential lead in votes, county by county. The figure counts voters who changed sides and differences in who turned out alike; the count cannot tell them apart.
- McHenry County+11,482 Foster
- Kane County+10,115 Foster
- DuPage County+5,772 Foster
- Will County+2,368 Foster
- Boone County+1,429 Foster
- Lake County+1,343 Foster
- Cook County+1,190 Foster
- DeKalb County+869 Foster
4 counties Donald Trump carried in 2024 are led by Foster this year
Striped on the map above. Largest first.
- McHenry CountyR+4.1D+13.3
- Lake CountyR+0.9D+16.7
- Boone CountyR+9.6D+7.9
- Cook CountyR+18.8D+1.1
Illinois’s ballot
StatewideDemocrats won all 6 of Illinois's statewide races.
U.S. HouseBefore the election D 14–3, now D 14–3
won leads, still counting changed party. Margins are the leader’s share minus the runner-up’s, in points.
Every count on this page is the official count, from the state and its counties. Counts are unofficial until the state certifies them. The 2024 comparison is the presidential vote, Kamala Harris against Donald Trump, on the same ground. Margins are the Democrat minus the Republican, in points of all votes.