Aabenraa Municipality is a kommune in the Region of Southern Denmark in southwestern Denmark. The municipality has an area of 940.7 km2 and a total population of 59,002 (2023). Its largest town and the site of its municipal council is the city of Aabenraa. The mayor of the municipality is Jan Riber Jakobsen, representing the Conservative People's Party.

Aabenraa is a town in Southern Denmark, at the head of the Aabenraa Fjord, an arm of the Little Belt, 26 kilometres (16 mi) north of the Denmark–Germany border and 32 kilometres (20 mi) north of German town of Flensburg. It was the seat of Sønderjyllands Amt until 1 January 2007, when the Region of Southern Denmark was created as part of the 2007 Danish Municipal Reform. With a population of 16,685, Aabenraa is the largest town and the seat of the Aabenraa Municipality.