Illinois Congressional Districts 2026
Illinois has 17 congressional seats in the US House of Representatives. Most competitive: IL-13 (central IL, R lean), IL-17 (Quad Cities, D lean).
Illinois House Districts Overview
| District | Rating | Region / Key Area | 2024 Margin |
|---|---|---|---|
| IL-13 | Republican lean | Central IL/Springfield | R+5 |
| IL-17 | Democratic lean | Quad Cities/Rockford | D+3 |
| IL-6 | Democratic | Chicago NW suburbs | D+8 |
| IL-14 | Democratic | Chicago western suburbs | D+5 |
| IL-16 | Republican | NW IL rural | R+18 |
District Analysis
Illinois lost one seat after the 2020 census, going from 18 to 17. Democrats control the legislature and drew a map favoring their party. IL-13 in central Illinois (Springfield area) and IL-17 in the Quad Cities region are the most competitive. Most Chicago-area seats are safely Democratic.
2026 Race Outlook
Most competitive districts in Illinois for 2026: IL-13 (central IL, R lean), IL-17 (Quad Cities, D lean).
The 2026 midterm election will be held on November 3, 2026. Primary elections in Illinois are typically held in the spring or summer of 2026. Candidates begin filing in late 2025 or early 2026, depending on Illinois election law.