Parker, CO. Parker is a home rule municipality in Douglas County, Colorado, United States. As a self-declared "Town" under the Home Rule statutes, Parker is the second most populous town in the county; Castle Rock is the most populous. In recent years, Parker has become a commuter town at the southeasternmost corner of the Denver Metropolitan Area. As of the 2010 census the town population was 45,297; the estimated population in 2014 was 49,857. Parker is now the 19th most populous municipality in the state of Colorado.
Parker, CO, with surrounding areas in Centennial, Lone Tree, Highlands Ranch, Castle Pines, or Aurora, is home to Otomi Martial Arts, a Martial Arts facility focusing on programs in Kids Martial Arts, Summer Camp, Birthday Parties, After School, and Brazilian Jiu Jitsu.