Marmorera (German: Marmels) is a village and former municipality in the Sursés in the district of Albula in the canton of Graubünden in Switzerland.

This figure has however since been in decline, with its 2000 census reporting that 57% of the population now declared German as a first language.

Of the rest of the land, 1% is settled (buildings or roads) and the remainder (40.4%) is non-productive (rivers, glaciers or mountains).

Until 1950 it was a linear village on the Septimer-Julier-Route, but was destroyed and flooded when the Marmorera dam was constructed.

[6] In the 2007 federal election the most popular party was the SVP which received 51.2% of the vote.

The ruins of old Marmorera are listed as a Swiss heritage sites of national significance.