Mosalsky Uyezd

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. Population:

Mosalsk () is a town and the administrative center of Mosalsky District in Kaluga Oblast, Russia, located west of Kaluga, the administrative center of the oblast. Population: