Per diem rates in Illinois (IL)
Destination areas listed in Illinois (IL) for fiscal years FY2026, FY2027 — each row is one rate record from the U.S. General Services Administration rate files. Period the records on this page cover: FY2026 rates run October 1, 2025 to September 30, 2026; FY2027 rates run October 1, 2026 to September 30, 2027.
Destination areas and seasons
| State name | Destination | County defined | Fiscal year | Season begin | Season end | Season months | Lodging rate (USD) | Mie rate (USD) |
|---|---|---|---|---|---|---|---|---|
| Illinois | Bolingbrook / Romeoville / Lemont | Will | 2026 | not available | not available | January to December | $114 | $74 |
| Illinois | Bolingbrook / Romeoville / Lemont | Will | 2027 | October 1, 2026 | September 30, 2027 | October to September | $119 | $74 |
| Illinois | Chicago | Cook / Lake | 2026 | April 1 | June 30 | April to June | $234 | $92 |
| Illinois | Chicago | Cook / Lake | 2026 | December 1 | March 31 | December to March | $142 | $92 |
| Illinois | Chicago | Cook / Lake | 2026 | July 1 | August 31 | July to August | $202 | $92 |
| Illinois | Chicago | Cook / Lake | 2026 | October 1 | November 30 | October to November | $223 | $92 |
| Illinois | Chicago | Cook / Lake | 2026 | September 1 | September 30 | September | $223 | $92 |
| Illinois | Chicago | Cook / Lake | 2027 | April 1, 2027 | June 30, 2027 | April to June | $238 | $92 |
| Illinois | Chicago | Cook / Lake | 2027 | December 1, 2026 | March 31, 2027 | December to March | $148 | $92 |
| Illinois | Chicago | Cook / Lake | 2027 | July 1, 2027 | August 31, 2027 | July to August | $213 | $92 |
| Illinois | Chicago | Cook / Lake | 2027 | October 1, 2026 | November 30, 2026 | October to November | $232 | $92 |
| Illinois | Chicago | Cook / Lake | 2027 | September 1, 2027 | September 30, 2027 | September | $232 | $92 |
| Illinois | East St. Louis / O'Fallon / Fairview Heights | St. Clair | 2026 | not available | not available | January to December | $150 | $86 |
| Illinois | East St. Louis / O'Fallon / Fairview Heights | St. Clair | 2027 | October 1, 2026 | September 30, 2027 | October to September | $156 | $86 |
| Illinois | Oak Brook Terrace | DuPage | 2026 | not available | not available | January to December | $115 | $80 |
| Illinois | Oakbrook Terrace | DuPage | 2027 | October 1, 2026 | September 30, 2027 | October to September | $123 | $80 |
Source and period
Period the records on this page cover: FY2026 rates run October 1, 2025 to September 30, 2026; FY2027 rates run October 1, 2026 to September 30, 2027.
- Source for FY2026: U.S. General Services Administration - FY2026 Per Diem Master Rates File (CONUS, effective October 1, 2025).
- Source for FY2027: U.S. General Services Administration - FY2027 Per Diem Rates (CONUS master rate file, effective October 1, 2026).
- Licence: GSA website policies — “Works produced by federal government employees in the course of their employment are generally not protected by copyright and are in the public domain in the U.S.”
- Rate files fetched 2026-11-05.