Evergreen is a census-designated place (CDP) and a U.S. Post Office in Jefferson County, Colorado, United States. Evergreen is roughly 29 miles (47 km) west of Denver. The population was 9,038 at the 2010 census.
A post office called Evergreen has been in operation since 1876. The community was named for evergreen trees near the original town site.
Since Evergreen is an unincorporated area, services usually provided by a city's government are provided by multiple agencies. The county maintains the roads (less State Highway 74), oversees planning and zoning, provides primary and secondary education through its school district and provides law enforcement through its sheriff's office. Evergreen Fire/Rescue provides fire protection and emergency medical response service. Water and sewer services operate under the administration of the Evergreen Metropolitan District.
Evergreen sits at an elevation of 7,220 feet (2,200 m) in the Rocky Mountains, 19 miles west of Denver, Colorado. Evergreen is located at 39°38′20″N 105°20′11″W (39.638905, -105.336318).
According to the United States Census Bureau, the CDP has a total area of 11.6 square miles (30 km2), of which, 11.6 square miles (30 km2) of it is land and 0.1 square miles (0.26 km2) of it (0.52%) is water.
Evergreen has a humid continental climate (Koppen: Dfb) with four different seasons.