Sandin (; , Sanyñn) is a rural locality (a khutor) in Yermolayevsky Selsoviet, Kuyurgazinsky District, Bashkortostan, Russia. The population was 13 as of 2010. There is 1 street.
Sandin is located 18 km southwest of Yermolayevo (the district's administrative centre) by road. Sandin 2-y is the nearest rural locality.