Sarn has an area,, of. Of this area, 78.9% is used for agricultural purposes, while 15.1% is forested. Of the rest of the land, 3.2% is settled and the remainder is non-productive. The municipality is located in the Thusis sub-district, of the Hinterrhein district. It consists of the haufendorfvillage of Sarn on the Heinzenberg mountains. The municipalities of Portein, Präz, Sarn, and Tartar merged on 1 January 2010 into the municipality of Cazis.
Demographics
Sarn has a population of 142, of which 8.5% are foreign nationals. Over the last 10 years the population has decreased at a rate of -15.5%. , the gender distribution of the population was 51.4% male and 48.6% female. The age distribution,, in Sarn is; 27 people or 17.0% of the population are between 0 and 9 years old. 14 people or 8.8% are 10 to 14, and 9 people or 5.7% are 15 to 19. Of the adult population, 8 people or 5.0% of the population are between 20 and 29 years old. 25 people or 15.7% are 30 to 39, 26 people or 16.4% are 40 to 49, and 16 people or 10.1% are 50 to 59. The senior population distribution is 18 people or 11.3% of the population are between 60 and 69 years old, 14 people or 8.8% are 70 to 79, there are 2 people or 1.3% who are 80 to 89. In the 2007 federal election the most popular party was the SVP which received 51.5% of the vote. The next three most popular parties were the FDP, the FDP and the CVP. The entire Swiss population is generally well educated. In Sarn about 71% of the population have completed either non-mandatory upper secondary education or additional higher education. Sarn has an unemployment rate of 0%. , there were 39 people employed in the primary economic sector and about 12 businesses involved in this sector. 10 people are employed in the secondary sector and there is 1 business in this sector. 7 people are employed in the tertiary sector, with 6 businesses in this sector. The historical population is given in the following table:
year
population
1850
259
1900
150
1950
168
2000
159
Languages
Most of the population speaks German, with Italian being second most common and English being third.
