Sredny Muynak (; , Urta Muynaq) is a rural locality (a village) in Muynaksky Selsoviet, Zianchurinsky District, Bashkortostan, Russia. The population was 176 as of 2010. There are 2 streets.
Sredny Muynak is located 26 km southeast of Isyangulovo (the district's administrative centre) by road. Verkhny Muynak is the nearest rural locality.