Bethel is a city in Anoka County, Minnesota, United States. The population was 466 at the 2010 census. According to the United States Census …Bethel is a city in Anoka County, Minnesota, United States. The population was 466 at the 2010 census. According to the United States Census Bureau, the city has a total area of 0.97 square miles, of which 0.91 square miles is land and 0.06 square miles is water.