Circle Pines is a city in Anoka County, Minnesota, United States. The population was 4,918 at the 2010 census. Circle Pines was founded as a planned cooperative community in which homeowners owned equal shares in the cooperative association which owned and developed the community. The name was selected because the cooperative movement in the United States in the 1940s used a circle encompassing two pine trees as its symbol. Although the community is no longer governed as a co–op, a municipally–owned gas utility remains as an operational memorial to Circle Pines' community heritage. (wikipedia.org)