Tiefencastel is first mentioned in 831 as in Castello Impitinis. Starting around in the 14th Century it was known as Tüffenkasten.
Geography
Before the merger, Tiefencastel had a total area of. Of this area, 20.3% is used for agricultural purposes, while 49.6% is forested. Of the rest of the land, 3.1% is settled and the remainder is non-productive. It was the capital of the Albula district. The former municipality is located at the foot of the Albula and Julier passes.
Demographics
Tiefencastel had a population of 254. , 15.7% of the population was made up of foreign nationals. Over the last 10 years the population has decreased at a rate of -2.2%. Most of the population speaks German, with Romansh being second most common language and Italian the third. , the gender distribution of the population was 49.6% male and 50.4% female. The age distribution,, in Tiefencastel is; 37 people or 16.1% of the population are between 0 and 9 years old. 16 people or 7.0% are 10 to 14, and 8 people or 3.5% are 15 to 19. Of the adult population, 23 people or 10.0% of the population are between 20 and 29 years old. 36 people or 15.7% are 30 to 39, 36 people or 15.7% are 40 to 49, and 27 people or 11.7% are 50 to 59. The senior population distribution is 25 people or 10.9% of the population are between 60 and 69 years old, 15 people or 6.5% are 70 to 79, there are 6 people or 2.6% who are 80 to 89, and there are 1 people or 0.4% who are 90 to 99. In the 2007 federal election the most popular party was the CVP which received 42.5% of the vote. The next three most popular parties were the SVP, the SPS and the FDP. In Tiefencastel about 69.6% of the population have completed either non-mandatory upper secondary education or additional higher education. Tiefencastel has an unemployment rate of 1.93%. , there were 7 people employed in the primary economic sector and about 3 businesses involved in this sector. 73 people are employed in the secondary sector and there are 8 businesses in this sector. 133 people are employed in the tertiary sector, with 29 businesses in this sector. The historical population is given in the following table:
year
population
1850
135
1880
209
1900
257
1950
327
1960
306
1970
310
1980
277
1990
239
2000
241
2010
269
Climate
Tiefencastel has an average of 98.6 days of rain per year and on average receives of precipitation. The wettest month is August during which time Tiefencastel receives an average of of precipitation. During this month there is precipitation for an average of 10.8 days. The month with the most days of precipitation is June, with an average of 11.3, but with only of precipitation. The driest month of the year is February with an average of of precipitation over 10.8 days.
