The Anne Arundel County Police Department is the primary law enforcement agency of Anne Arundel County, Maryland, United States, serving a population of more than 564,195 per 2015 census estimates across 588 square miles (1,500 km2) of jurisdiction. The Department was created by an Act of the Maryland General Assembly in 1937, and originally consisted of a Chief of Police, three sergeants, and seventeen patrolmen.