Medyn () is a town and the administrative center of Medynsky District in Kaluga Oblast, Russia, located on the Medynka River (Oka basin),  northwest of Kaluga, the administrative center of the oblast.
Medyn is a municipality and the central authority of Medynsky District in Kaluga Province, Russia, situated along the Medynka River (part of the Oka river system), approximately northwest of Kaluga, which serves as the provincial capital.