 Most of the population () speaks German (93.6%), with French being second most common ( 0.9%) and Italian being third ( 0.9%).Until long into the 20th century, Adligenswil retained an exclusively Roman Catholic population.the religious membership of Adligenswil was; 3,221 (64.3%) were Roman Catholic, and 1,001 (20.%) were Protestant, with an additional 45 (0.9%) that were of some other Christian faith.