Indiana State Road 37

State Road 37
SR 37 highlighted in red
Route information
Maintained by INDOT
Length	157 mi (253 km)
Existed	October 1, 1926[4]–present
Southern segment
Length	96 mi[1] (154 km)
South end	SR 66 in Tell City
Major intersections	I-64 in St. Croix
North end	I-69 near Bloomington
Central segment
Length	46.6 mi[2] (75.0 km)
South end	I-69 in Fishers
North end	SR 9 in Marion
Northern segment
Length	14.4 mi[3] (23.2 km)
South end	I-469 / US 24 / US 30 in Fort Wayne
Major intersections	SR 101 in Springfield Township
North end	SR 2 in Scipio Township
Location
Country	United States
State	Indiana
Counties	Perry, Crawford, Orange, Lawrence, Monroe, Hamilton, Madison, Grant, Allen
Highway system
Indiana State Highway System Interstate US State Scenic
← US 36 → SR 38

State Road 37 (SR 37) is a major route in the U.S. state of Indiana, running as a four-lane divided highway for a majority of its course in Southern and Central Indiana.

At one time, the route ran from the southwest corner of the state to the northeast corner. In the pre-Interstate Highway era, SR 37 was the most direct route between Fort Wayne and Indianapolis. Interstate 69 has supplanted it as a through route, and State Road 37 now consists of three disconnected segments, with the segment through Indianapolis being replaced entirely by Interstate 69 in 2024. The longer segment starts at Tell City on the Ohio River and ends in Bloomington in south central Indiana. Another shorter segment resumes off of Interstate 69 and runs northeast to SR 9 in Marion. The other segment in northeastern Indiana runs from Interstate 469 near Fort Wayne to the Ohio state line.