Aarhus County or Århus County is a former county (Danish: amt) in central Denmark on the Jutland peninsula. 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 closure, more than 20,000 people worked for the county.