Illinois elected its member August 7, 1826.
| District | Incumbent | This race | |||
|---|---|---|---|---|---|
| Member | Party | First elected | Results | Candidates | |
| Illinois at-large | Daniel P. Cook | Anti-Jacksonian | 1819 | Incumbent lost re-election. New member elected. Jacksonian gain. |
|
See also
- 1826 and 1827 United States House of Representatives elections
- List of United States representatives from Illinois