Spas-Demensky District (Russian: Спас-Де́менский райо́н) is an administrative[1] and municipal[5] district (raion), one of the twenty-four in Kaluga Oblast, Russia.

The area of the district is 1,369 square kilometers (529 sq mi).

[3] Its administrative center is the town of Spas-Demensk.

[7] The district was established in 1929 within Sukhinichi Okrug of Western Oblast from a part of former Mosalsky Uyezd.

[2] It became a part of Kaluga Oblast on July 5, 1944.