Sursilvan (pronounced [sursilˈvaːn] ; also romontsch sursilvan [roˈmɔntʃ sursilˈvaːn]; Sursilvan, Vallader, Surmiran, Sutsilvan, and Rumantsch Grischun: sursilvan; Puter: sursilvaun) is a group of dialects of the Romansh language spoken in the Swiss district of Surselva. It is the most widely spoken variety of Romansh with 17,897 people within the Surselva District (54.8%) naming Romansh as a habitually spoken language in the Swiss census of 2000. The most closely related variety is Sutsilvan, which is spoken in the area located to the east of the district.