Casti-Wergenstein was created in 1923 through the union of the formerly independent municipalities of Casti and Wergenstein. Casti is first mentioned in 1204 as ad Castellum. Wergenstein is first mentioned in 1219 as Vergasteno.
Geography
Casti-Wergenstein has an area, of. Of this area, about 50.0% is used for agricultural purposes, while 9.1% is forested. Of the rest of the land, 0.7% is settled and 40.2% is unproductive land. In the 2004/09 survey a total of or about 0.3% of the total area was covered with buildings, an increase of over the 1984/85 amount. Of the agricultural land, is fields and grasslands and consists of alpine grazing areas. Since 1984/85 the amount of agricultural land has decreased by. Over the same time period the amount of forested land has increased by. Rivers and lakes cover in the municipality. Before 2017, the municipality was located in the Schams sub-district, of the Hinterrhein district, after 2017 it was part of the Viamala Region.
Demographics
Casti-Wergenstein has a population of. , 7.7% of the population are resident foreign nationals. Over the last 5 years the population has changed at a rate of -10.34%. The birth rate in the municipality, in 2015, was 19.4, while the death rate was 0.0 per thousand residents. , children and teenagers make up 17.3% of the population, while adults are 67.3% of the population and seniors make up 15.4%. In 2015 there were 24 single residents, 26 people who were married or in a civil partnership, widows or widowers and 2 divorced residents. In 2015 there were 21 private households in Casti-Wergenstein with an average household size of 2.48 persons. In 2015 about 66% of all buildings in the municipality were single-family homes, which is much greater than the percentage in the canton and greater than the percentage nationally. Of the 41 inhabited buildings in the municipality, in 2000, about 68.3% were single-family homes and 12.2% were multiple family buildings. Additionally, about 39.0% of the buildings were built before 1919, while 12.2% were built between 1991 and 2000. In 2014 there was no new housing construction and the vacancy rate for the municipality,, was 0.0%. , the gender distribution of the population was 55.0% male and 45.0% female. The historical population is given in the following chart: Colors= id:lightgrey value:gray id:darkgrey value:gray ImageSize = width: auto height:200 barincrement:45 PlotArea = top:20 left:40 bottom:20 right:35 AlignBars = justify DateFormat = x.y Period = from:0 till:100 TimeAxis = orientation:vertical AlignBars = justify ScaleMajor = gridcolor:darkgrey increment:100 start:0 ScaleMinor = gridcolor:lightgrey increment:20 start:0 PlotData= color:yellowgreen width: 35 mark: align:center bar:1850a from:start till:95 text:"95" bar:1860a from:start till:76 text:"76" bar:1870a from:start till:65 text:"65" bar:1880a from:start till:73 text:"73" bar:1888a from:start till:52 text:"52" bar:1900a from:start till:45 text:"45" bar:1910a from:start till:33 text:"33" bar:1920a from:start till:43 text:"43" bar:1930 from:start till:40 text:"40" bar:1941 from:start till:66 text:"66" bar:1950 from:start till:52 text:"52" bar:1960 from:start till:43 text:"43" bar:1970 from:start till:36 text:"36" bar:1980 from:start till:36 text:"36" bar:1990 from:start till:43 text:"43" bar:2000 from:start till:56 text:"56" bar:2010 from:start till:59 text:"59" bar:2015 from:start till:52 text:"52"
Politics
In the 2015 federal election the most popular party was the SVP with 36.7% of the vote. The next three most popular parties were the FDP, the BDP and the SP. In the federal election, a total of 24 votes were cast, and the voter turnout was 58.5%. The 2015 election saw a large change in the voting when compared to 2011. The percentage of the vote received by the FDP increased sharply from 2.0% in 2011 to 21.7% in 2015, as did the SP from 5.1% to 10.8%. The percentage that the SVP received dropped from 41.8% to 36.7% and the BDP dropped from 41.8% to 13.3%. In the 2007 federal election the most popular party was the SVP which received 46.7% of the vote. The next three most popular parties were the SPS, the CVP and the FDP.
Casti-Wergenstein is a mixed agricultural and tertiary community, a municipality where agriculture and tertiary sector play a significant role in the economy. , there were a total of 28 people employed in the municipality. Of these, a total of 10 people worked in 4 businesses in the primary economic sector. There were no workers or businesses in the secondary sector. Finally, the tertiary sector provided 18 jobs in 5 businesses. In 2015 a total of 0.0% of the population received social assistance. In 2011 the unemployment rate in the municipality was 0%. In 2015 the average cantonal, municipal and church tax rate in the municipality for a couple with two children making was 4.2% while the rate for a single person making was 18.3%, both of which are much higher than average for the canton or nationally. In 2013 the average income in the municipality per tax payer was and the per person average was, which is less than the cantonal average of and respectively It is also less than the national per tax payer average of and the per person average of.
Languages
The municipality was once exclusively Romansh-speaking, using the Sursilvan dialect. However, since World War I, German has grown to the point that it is about evenly divided between Romansh-speaking and German-speaking population. Both are used as official languages in the municipality. Most of the population speaks Rhaeto-Romance, with German being second most common and Italian being third.
