| Official Name: | Staromusino |
| Native Name: | Старомусино |
| Native Name Lang: | ru |
| Settlement Type: | Village |
| Pushpin Map: | Russia Bashkortostan#Russia |
| Subdivision Type: | Country |
| Subdivision Name: | Russia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Bashkortostan |
| Subdivision Type2: | County |
| Subdivision Type3: | District |
| Subdivision Name3: | Karmaskalinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +5:00 |
| Coordinates: | 54.35°N 111°W[1] |
Staromusino (Russian: Старомусино; Bashkir: Иҫке Муса, İśke Musa) is a rural locality (a village) and the administrative centre of Staromusinsky Selsoviet, Karmaskalinsky District, Bashkortostan, Russia. The population was 580 as of 2010.[2] There are 8 streets.
Staromusino is located 17 km west of Karmaskaly (the district's administrative centre) by road. Novomusino is the nearest rural locality.[3]