Anoka is a city in Anoka County, Minnesota, United States. The population was 18,076 at the 2000 census. It is the county seat of Anoka County. Anoka is also the self-proclaimed "Halloween Capital of the World", because it hosted one of the first Halloween parades in 1920. In 1937, city officials persuaded the United States Congress to officially grant the title. It continues to celebrate the holiday each year with several parades. Anoka is a northern suburb of the Twin Cities. U.S. Highways 10 / 169 and State Highway 47 are three of the main arterial routes, and a station on the Northstar Commuter Rail line to downtown Minneapolis is located in the city.