Sierra Ridge is an unincorporated community and a census-designated place (CDP) located in and governed by Douglas County, Colorado, United States. The population was 3,490 at the 2020 census. The CDP is a part of the DenverâÂÂAuroraâÂÂLakewood, CO Metropolitan Statistical Area. The unincorporated community lies in ZIP Code 80134.
The Sierra Ridge CDP has an area of , all land.
The United States Census Bureau defined the for the
The Douglas County School District RE-1 serves Sierra Ridge.