Trin is a municipality in the Imboden Region in the Swiss canton of Graubünden.

[3] Trin is perched on the mountain-side above the Rhine valley on the road between Domat/Ems and Flims.

The village of Mulin (also in the municipality) is at the foot of the slope on the edge of the valley.

Of the rest of the land, 1.7% is settled (buildings or roads) and the remainder (40.8%) is non-productive (rivers, glaciers or mountains).

[8] In the 2007 federal election the most popular party was the FDP which received 36.4% of the vote.

[4] From the 2000 census[update], 251 or 22.7% are Roman Catholic, while 624 or 56.3% belonged to the Swiss Reformed Church.

[4] The Crap Sogn Parcazi, a ruined castle and fortified church is listed as a Swiss heritage site of national significance.