Spas-Demensk () is a town and the administrative center of Spas-Demensky District in Kaluga Oblast, Russia, located on the Demena River (an arm of the Ugra)  west of Kaluga, the administrative center of the oblast.
Spas-Demensk is a town that serves as the administrative center for Spas-Demensky District within Kaluga Oblast, Russia. It's located on the Demena River, a tributary of the Ugra River, and situated west of Kaluga, which is the regional capital of the oblast.