Aars Municipality was a municipality (Danish, kommune) in northern Denmark, in the county of North Jutland on the peninsula of Jutland. It was established as a result of the 1970 Danish Municipal Reform and ceased to exist following the Municipal reform of 2007. Today, the region is located within Vesthimmerland Municipality.

The municipality was established by the 1970 reforms which grouped parishes into municipalities. Aars municipality was made up of the parishes of: Blære, Gislum, Giver, Gundersted, Havbro, Skivum, Ulstrup, Vognsild, and Aars parish.

By 2005, the municipality covered an area of 223 km and had a total population of 13,284. Its final mayor was Knud V. Christensen, a member of the Conservative People's Party. On 1 January 2007 Aars municipality ceased to exist and was merged with the former Farsø, Løgstør, and Aalestrup municipalities to form the new Vesthimmerland Municipality, with an area of 815 km and a total population of 39,176 (2005).

• Holger Mikkelsen, 1970–1971 (Venstre)
• Niels Nystrup Haugård, 1971–1974 (Venstre)
• Alfred Rask, 1974–1982 (Venstre)
• Martin Glerup, 1982–1986 (Socialdemokratiet)
• Ejvind Nielsen, 1986–1990 (Venstre)
• Per Nørgaard, 1990–2002 (Venstre)
• Knud Vældgaard Kristensen, 2002–2007 (Det Konservative Folkeparti)

• Kopparberg

56°48′16″N 9°30′37″E / 56.804489°N 9.510164°E / 56.804489; 9.510164