Greenland is an unincorporated community in Douglas County, Colorado, United States. Greenland is located off Exit 167 on Interstate 25. The largest nearby incorporated towns are Larkspur and Monument: Larkspur lies about 7 miles northeast and Monument about 13 miles south of the community. The U.S. Post Office at Larkspur (ZIP Code 80118) now serves the Greenland postal addresses. A post office called Greenland was established in 1873, and remained in operation until 1959. The community was named for the green character of the original town site.