Tashtau (; , Taà Âtaw) is a rural locality (a selo) in Semiletovsky Selsoviet, Dyurtyulinsky District, Bashkortostan, Russia. The population was 212 as of 2010. There are 3 streets.
Tashtau is located 21 km southwest of Dyurtyuli (the district's administrative centre) by road. Nizhneatashevo is the nearest rural locality.