Kuyanchi (; , Quyansñ) is a rural locality (a village) in Podlubovsky Selsoviet, Karaidelsky District, Bashkortostan, Russia. The population was 55 as of 2010. There is 1 street.
Kuyanchi is located 54 km southwest of Karaidel (the district's administrative centre) by road. Teter-Klyuch is the nearest rural locality.