Aars Municipality was a municipality (Danish, kommune) in northern Denmark, in the county of North Jutland on the peninsula of Jutland.

Today, the region is located within Vesthimmerland Municipality.

Aars municipality was made up of the parishes of: Blære, Gislum, Giver, Gundersted, Havbro, Skivum, Ulstrup, Vognsild, and Aars parish.

[citation needed] By 2005, the municipality covered an area of 223 km2 and had a total population of 13,284.

Its final mayor was Knud V. Christensen, a member of the Conservative People's Party.