The city of Glendale is a Home Rule Municipality located in an exclave of Arapahoe County, Colorado, United States. The population was 4,184 at the 2010 census. The entire city is surrounded on all sides by the City and County of Denver. Therefore, as a municipal entity, it is also an enclave. Glendale's fire and medical services have been provided by the Denver Fire Department and Denver Paramedics through a contract by the City and County of Denver since 2005.