Country information

• Area : 83 858,3 km²
• Population: 8 932 664 inhabitants
• Capital: Vienne (1 920 949 inhabitants)
• Largest cities and number of inhabitants: Graz (291 134), Linz (206 537), Salzburg (155 416), Innsbruck (131 059), Klagenfurt (101 765).
• Official language and other recognised languages: German ; sign language ; Croatian, Hungarian (Burgenland), Slovene (Carinthia).
• Regions: nine federated states: Lower Austria, Burgenland, Carinthia, Upper Austria, Salzburg, Styria, Tyrol, Vienna, Vorarlberg.

There are no current official statistical data on religious affiliation available. Last available statistics from Statistics Austria (the federal statistics office) date from 2001. Since then, the official census has been replaced by the compilation of registers and religious affiliation is no longer surveyed (see the Federal Law on register counting [Registerzählungsgesetz], BGBI. I No. 33/2006, subsequently amended by BGBI. I No. 125/2009). Demographic projections based on these numbers, as well as on migration movements, fertility rates, and secularisation tendencies estimate for 2018 that the population is divided into approximately 63% Catholics, 8% Muslims, 5% Orthodox Christians, 5% Protestants, 2% affiliated with other religious traditions (e.g. Buddhism, Judaism, other Christian Churches, etc.) and 18% unaffiliated persons (Source: Goujon, Anne/Reiter, Claudia/Potančoková, Michaela 2019: Religious affiliations in Austria at the provincial level: Estimates for Vorarlberg, 2001-2018. VID Working Papers 13/2018. Vienna).