| STS-61-M | |
| Names List: | Space Transportation System |
| Mission Type: | TDRS-D satellite deployment (planned) |
| Operator: | NASA |
| Spacecraft: | (planned) |
| Crew Size: | 6 |
| Crew Members: | Loren J. Shriver Bryan D. O'Connor Mark C. Lee Sally K. Ride William Frederick Fisher Robert Wood |
| Launch Date: | July 22, 1986 (planned) Not launched |
| Launch Rocket: | Space Shuttle Challenger |
| Launch Site: | Kennedy Space Center, LC-39A |
| Launch Contractor: | Rockwell International |
| Orbit Reference: | Geocentric orbit (planned) |
| Orbit Regime: | Low Earth orbit |
| Orbit Inclination: | 28.45° |
| Orbit Period: | 90.40 minutes |
| Apsis: | gee |
| Insignia: | Shuttle_Patch.png |
| Insignia Caption: | Space Shuttle patch |
| Insignia Size: | 200px |
| Crew Photo Size: | 300px |
| Programme: | Space Shuttle program |
| Previous Mission: | STS-51-L (25) ← |
| Next Mission: | STS-26 → |
STS-61-M was a proposed NASA Space Shuttle program mission, planned for July 1986 but canceled following the Space Shuttle Challenger disaster (STS-51-L).
Payload was to have been TDRS-D of the U.S. tracking and data relay satellite (TDRS) satellites.