Flerden (Romansh: Flearda) is a municipality in the Viamala Region in the Swiss canton of Graubünden.

Of the rest of the land, 3.6% is settled (buildings or roads) and the remainder (11.7%) is non-productive (rivers, glaciers or mountains).

[4] Before 2017, the municipality was located in the Thusis sub-district, of the Hinterrhein district, after 2017 it was part of the Viamala Region.

[5] It consists of the haufendorf (an irregular, unplanned and quite closely packed village, built around a central square) of Flerden on the inner Heinzenberg at an elevation of 1,234 m (4,049 ft).

[8] In the 2007 federal election the most popular party was the SVP which received 47.6% of the vote.