Aarhus County or Århus County (Danish: Århus Amt) is a former county of Denmark (Danish: amt) on the Jutland peninsula. It was created in 1970 by a merger of three counties: Århus, Randers and Skanderborg. The county was abolished effective 1 January 2007, when almost all of it merged into Region Midtjylland (i.e. Region Central Jutland). A very small portion was merged into Region Nordjylland (Region North Jutland). At the time of its abolishment, more than 20,000 people worked for the county.

Aarhus municipality Ebeltoft municipality Galten municipality Gjern municipality Grenaa municipality Hadsten municipality Hammel municipality Hinnerup municipality Hørning municipality Langå municipality Mariager municipality Midtdjurs municipality Nørhald municipality

Nørre Djurs municipality Odder municipality Purhus municipality Randers municipality Rosenholm municipality Rougsø municipality Ry municipality Rønde municipality Samsø municipality Silkeborg municipality Skanderborg municipality Sønderhald municipality Them municipality

56°09′N 10°12′E / 56.15°N 10.20°E / 56.15; 10.20