Usabash (; , Uà Âñbaà Â) is a rural locality (a village) in Oktyabrsky Selsoviet, Blagoveshchensky District, Bashkortostan, Russia. The population was 93 as of 2010. There is 1 street.
Usabash is located 73 km northeast of Blagoveshchensk (the district's administrative centre) by road. Yezhovka is the nearest rural locality.