Dunapataj is a village in Bács-Kiskun county, Hungary.

It lies 10 km (6 mi) north from Kalocsa. It is the administrative headquarters of the local museum. Lake Szelidi, a holiday resort and nature reserve with unique wildlife is 4 km (2 mi) away. The Calvinist Church includes Gothic architecture remains from the 15th century and the Baroque-style Church of Saint John of Nepomuk dates from 1761. A former Transylvanian style Unitarian church, built in 1937, is located in the middle of town and houses the local history documents of the Museum of Pataj.