| State: | IN |
| Type: | IN |
| Route: | 650 |
| Map Custom: | yes |
| Map Notes: | SR 650 highlighted in red |
| Length Mi: | 0.879 |
| Direction A: | West |
| Terminus A: | in Halbert Township |
| Direction B: | East |
| Terminus B: | USG Corporation plant in Halbert Township |
| Counties: | Martin |
| Previous Type: | IN |
| Previous Route: | 645 |
| Next Type: | IN |
| Next Route: | 662 |
State Road 650 (SR 650) is a State Road in the southern section of the state of Indiana. Running for about 0.9miles in a general northwest-southeast direction, connecting U.S. Route 50 (US 50) and a USG Corporation plant. The highway is entirely within Martin County and its eastern end is located at the plant's entrance. SR 650 was originally introduced in the mid-1950s.
SR 650 begins at a four-way intersection with US 50. North of the intersection, the road becomes the main entrance to Martin State Forest. SR 650 heads south from the intersection but curves shortly afterward to head east-southeast. The road passes through wooded areas and over a CSX railroad track. After crossing a tributary of the White River, the road ends at the entrance to the USG plant. SR 650 is an undivided two-lane road for its entire length. In 2014 the only location for a traffic count along SR 650 shows that 838 vehicles travel the highway on average each day.
SR 650 was added to the state road system between 1953 and 1956, as a paved highway. No major changes have occurred to SR 650 since it was added to the state road system.