Dekanatspfarrkirche Mariä Himmelfahrt, Parish church in St. Johann in Tirol, Austria.

The Dekanatspfarrkirche Mariä Himmelfahrt is a parish church in St. Johann in Tirol that displays Baroque architectural characteristics. The building stands as a key religious structure in the Kitzbühel District and exemplifies regional church design traditions.

A baptismal church dedicated to John the Baptist is documented before 738, giving the town its name. The parish was first recorded in 1216 and became a deanery in 1621. After flood damage made the medieval church unsafe, Abraham Millauer built the present church between 1723 and 1732; it was consecrated in 1732 by Prince-Bishop Joseph Franz Valerian von Arco.

The church has served as the community's spiritual center for centuries, hosting celebrations of major life events and religious observances. It remains a focal point in the townscape where locals mark their traditions.

The church is centrally located in St. Johann and is easily accessible on foot from the town center. Visitors should be aware that service times and religious observances may affect access to the interior.

The church is nicknamed the "Leukentaler Dom" (Leukental Cathedral) because from 1446 the Bishop of Chiemsee was automatically parish priest of St. Johann, and the church served as the cathedral of the diocese's Tyrolean district. The bishops used the town as a summer residence for official business.