Illinois Route 177
# Illinois Route 177

Illinois Route 177 is an east–west state route in southern Illinois. It runs from Illinois Route 13 in Belleville to U.S. Route 51 in Irvington. This is a distance of 47.59 miles (76.59 km).

## Route description

Illinois 177 overlaps Illinois Route 160 for about 9 miles (14 km) from south of New Baden to Okawville.

## History

SBI Route 177 originally ran from New Minden to Okawville. It was extended east to Irvington in 1937, replacing Route 153. In 1967, it was extended west to Belleville on an old routing of Illinois Route 15.

## Major Intersections

| County | Location | mi | km | Destinations | Notes |
| - | - | - | - | - | - |
| St. Clair | Belleville | 0.0 | 0.0 | IL 13 / IL 158 west – East St. Louis, Columbia, Pinckneyville | West end of IL 158 concurrency |
| St. Clair | ​ | 6.3 | 10.1 | IL 158 east – Scott Air Force Base | East end of IL 158 concurrency |
| St. Clair | Mascoutah | 10.2 | 16.4 | IL 4 (Jefferson Street) | |
| Clinton | ​ | 16.2 | 26.1 | IL 160 north – Highland | West end of IL 160 concurrency |
| Washington | Okawville | 25.1 | 40.4 | IL 160 south (South Front Street) – Addieville | East end of IL 160 concurrency |
| Washington | Okawville | 26.6 | 42.8 | I-64 – East St. Louis, Mt. Vernon | I-64 exit 41 |
| Washington | New Minden | 35.3 | 56.8 | IL 127 – Carlyle, Nashville | |
| Washington | ​ | 47.59 | 76.59 | US 51 | interchange |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus ||||||
