Kustarevka () is a rural locality (a village) in Shulganovsky Selsoviet, Tatyshlinsky District, Bashkortostan, Russia. The population was 1 as of 2010. There is 1 street.
Kustarevka is located 35 km southwest of Verkhniye Tatyshly (the district's administrative centre) by road. Zilyaktau is the nearest rural locality.