| Official Name: | Tyumenyak |
| Native Name: | Тюменяк |
| Native Name Lang: | ru |
| Settlement Type: | Selo |
| 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: | Tuymazinsky District |
| Subdivision Type4: | Municipality |
| Utc Offset1: | +5:00 |
| Coordinates: | 54.6667°N 100°W[1] |
Tyumenyak (Russian: Тюменяк; Bashkir: Төмәнәк, Tömänäk) is a rural locality (a selo) and the administrative centre of Tyumenyakovsky Selsoviet, Tuymazinsky District, Bashkortostan, Russia. The population was 1,070 as of 2010.[2] There are 10 streets.
Tyumenyak is located 14 km northeast of Tuymazy (the district's administrative centre) by road. Darvino is the nearest rural locality.[3]