Marshanovka () is a rural locality (a village) in Ryazanovsky Selsoviet, Sterlitamaksky District, Bashkortostan, Russia. The population was 83 as of 2010. There are 2 streets.
Marshanovka is located 16 km west of Sterlitamak (the district's administrative centre) by road. Ryazanovka is the nearest rural locality.