Mastrils is a former municipality in the district of Landquart in the Swiss canton of Graubünden. The municipalities of Igis and Mastrils merged on 1 January 2012 into the new municipality of Landquart.

Igis (Romansh: Eigias) is a former municipality in the district of Landquart in the Swiss canton of Graubünden. Far better known than its proper name Igis is its hamlet Landquart, because of its Rail Station and motorway exit. The municipalities of Igis and Mastrils merged on 1 January 2012 into the new municipality of Landquart.