Kalmash (; , Qalmaà Â) is a rural locality (a selo) in Duvansky Selsoviet, Duvansky District, Bashkortostan, Russia. The population was 131 as of 2010. There are 2 streets.
Kalmash is located 67 km west of Mesyagutovo (the district's administrative centre) by road. Komsomolsky and Oktyabrsky are the nearest rural localities.