Illinois Route 185
IL 185 highlighted in red
Route information
Maintained by IDOT
Length	49.88 mi[1] (80.27 km)
Existed	1924[2]–present
Major junctions
West end	IL 127 in Taylor Springs
Major intersections	US 40 in Vandalia US 51 in Vandalia US 40 in Bluff City I-57 in Farina
East end	IL 37 in Farina
Location
Country	United States
State	Illinois
Counties	Montgomery, Fayette
Highway system
Illinois State Highway System Interstate US State Tollways Scenic
← IL 184 → I-190

Illinois Route 185 is an east–west state road in the south-central portion of the U.S. state of Illinois. Its western terminus is in Taylor Springs at Illinois Route 127, and the eastern terminus is at Farina at Illinois Route 37. This is a distance of 49.88 miles (80.27 km).^[1]

Illinois 185 runs geographically northwest–southeast through south-central Illinois. It overlaps both U.S. Route 40 and U.S. Route 51 through the city of Vandalia.

SBI Route 185 originally ran from Bluff City to Farina. In 1949, it was extended northwest to Taylor Springs.^[2]

County	Location	mi[3]	km	Destinations	Notes
Montgomery	Taylor Springs	0.0	0.0	IL 127	Western terminus of IL 185
Fayette	Vandalia	23.7	38.1	US 40 west	West end of US 40 concurrency
		24.8	39.9	US 51 north (Kennedy Blvd) – Pana	West end of US 51 concurrency
	​	26.4	42.5	US 51 south – Sandoval	East end of US 51 concurrency
	​	30.5	49.1	US 40 east to I-70 – Brownstown	East end of US 40 concurrency
	Farina	48.9	78.7	I-57 – Effingham, Mt. Vernon	I-57 exit 135
		49.88	80.27	IL 37 – Effingham, Salem	Eastern terminus of IL 185
1.000 mi = 1.609 km; 1.000 km = 0.621 mi       Concurrency terminus