According to 2021 figures of Statistics Austria, 60.7% of the population are Catholic, and 7.6% are followers of other Christian denominations (3.8% Orthodox Christians, 2.5% Protestants, 1.3% other Christians). The second-largest religion, with a share of 13% is Islam. 0.6% of Vorarlberg's inhabitants profess another religion, while 18.9% profess no affiliation with any religion or denomination.
According to 2021 figures of Statistics Austria 60.7% of the population are Catholic, and 7.6% are followers of other Christian denominations (3.8% Orthodox Christians, 2.5% Protestants, 1.3% other Christians). The second-largest religion, with a share of 13% is Islam. 0.6% of Vorarlberg's inhabitants profess another religion, while 18.9% profess no affiliation with any religion or denomination.