| State: | IN |
| Type: | IN |
| Route: | 39 |
| Map Custom: | yes |
| Map Notes: | SR 39 highlighted in red |
| Established: | October 1, 1926[1] |
| Direction A: | South |
| Direction B: | North |
| Section1: | Southern section |
| Length Mi1: | 14.91 |
| Terminus A1: | near Scottsburg |
| Terminus B1: | near Brownstown |
| Section2: | Northern section |
| Length Mi2: | 179.7 |
| Terminus A2: | in Martinsville |
| Junction2: | near Monrovia in Belleville in Danville in Lizton in Lebanon in Monticello near Hanna near Kingsbury near La Porte in Springville |
| Terminus B2: | to near New Buffalo, Michigan |
| Counties: | Boone, Carroll, Clinton, Hendricks, Jackson, LaPorte, Morgan, Pulaski, Starke, Washington, White |
| Previous Type: | IN |
| Previous Route: | 38 |
| Next Type: | US |
| Next Route: | 40 |
State Road 39 (SR 39) in the U.S. state of Indiana is the name of two distinct north - south highways.
Located in south-central Indiana, the shorter southern section of SR 39 begins at SR 56 west of Scottsburg. It runs north and passes through Little York, then ends at an intersection with SR 250 just before reaching Brownstown.
The much longer northern section starts at I-69 in Martinsville, southwest of Indianapolis, and runs north to the Michigan border near I-94 (via M-239). Along the route, it passes through these towns (from south to north):
In the 1960s, SR 39 was the connector between the west end of I-94 (which ended just north of the Michigan-Indiana border) and the Indiana Toll Road. Hence, a dozen miles of this winding 2-lane road carried all the heavy traffic between Chicago and Detroit.
In 2010, the section of SR 39 between Monrovia and Belleville was greatly improved and re-paved.
At one point, SR 39 had a section from US 31 in Henryville to SR 3 in Charlestown. It was later decommissioned when SR 160 was extended to end in Charlestown.