the population has changed at a rate of 0.9%. Migration accounted for 1.6%, while births and deaths accounted for -0.4%. Most of the population () speaks German (2,813 or 94.7%) as their first language, Albanian is the second most common (36 or 1.2%) and Serbo-Croatian is the third (35 or 1.2%). There are 29 people who speak French, 4 people who speak Italian and 1 person who speaks Romansh. , the population was 48.8% male and 51.2% female. The population was made up of 1,294 Swiss men (44.3% of the population) and 131 (4.5%) non-Swiss men. There were 1,357 Swiss women (46.4%) and 140 (4.8%) non-Swiss women. Of the population in the municipality, 1,139 or about 38.4% were born in Zweisimmen and lived there in 2000. There were 1,099 or 37.0% who were born in the same canton, while 359 or 12.1% were born somewhere else in Switzerland, and 256 or 8.6% were born outside of Switzerland. , children and teenagers (0–19 years old) make up 18.1% of the population, while adults (20–64 years old) make up 58.1% and seniors (over 64 years old) make up 23.8%. , there were 1,112 people who were single and never married in the municipality. There were 1,521 married individuals, 233 widows or widowers and 104 individuals who are divorced. , there were 404 households that consist of only one person and 81 households with five or more people. , a total of 1,225 apartments (63.8% of the total) were permanently occupied, while 622 apartments (32.4%) were seasonally occupied and 74 apartments (3.9%) were empty. , the construction rate of new housing units was 16.4 new units per 1000 residents. In 2011, single family homes made up 37.5% of the total housing in the municipality. The historical population is given in the following chart: Heritage sites of national significance The village church and its rectory, the ruins of Oberer Mannenberg Castle and the ruins of Unterer Mannenberg Castle are listed as Swiss heritage site of national significance. Politics In the 2011 federal election the most popular party was the Swiss People's Party (SVP) which received 47.7% of the vote. The next three most popular parties were the Conservative Democratic Party (BDP) (18%), the Social Democratic Party (SP) (10.2%) and the FDP.The Liberals (7.6%). In the federal election, a total of 1,269 votes were cast, and the voter turnout was 55.5%. Economy , Zweisimmen had