Castrisch ([kɐˈʃtʁiʃ]ⓘ) is a former municipality in the district of Surselva in the Swiss canton of Graubünden.

Of the rest of the land, 3.3% is settled (buildings or roads) and the remainder (4.6%) is non-productive (rivers, glaciers or mountains).

Most of the population (as of 2000[update]) speaks Romansh(48.5%), with German being second most common (48.1%) and Spanish being third ( 1.2%).

[6] The age distribution, as of 2000[update], in Castrisch is; 53 children or 12.9% of the population are between 0 and 9 years old and 66 teenagers or 16.0% are between 10 and 19.

[5] In the 2007 federal election the most popular party was the SVP which received 37.9% of the vote.