Illinois State Route 177 runs east-west across Northern Washington County. It runs from the Clinton/Washington County Line to U.S. Rt. 51, near Irvington. IL St Rt 177 passes through the following towns in Washington County. Venedy Station Okawville
Hoyleton Irvington
IL St Rt 177 is multi-plexed in Washington County. Illinois State Route 160, from the Clinton/Washington County Line to Okawville.
IL St Rt 177 intersects the following highways in Washington County. Illinois State Route 160, at Okawville.
SB IL St Rt 160/EB IL St Rt 177 at the Clinton/Washington County Line. SB IL St Rt 160/EB IL St Rt 177 near Okawville. A junction marker on EB IL St Rt 160/SB IL St Rt 177. WB IL St Rt 177 east of Irvington. WB IL St Rt 177 east of U.S. Rt. 51. A BGS on SB U.S. Rt. 51. The eastern end marker.
