Upper Witter Gulch is an unincorporated community and a census-designated place (CDP) located in and governed by Clear Creek County, Colorado, United States.

[3] The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area.

The Evergreen post office (Zip Code 80439) serves the area.

[4] The Upper Witter Gulch CDP has an area of 583 acres (2.358 km2), all land.

[1] The United States Census Bureau defined the Upper Witter Gulch CDP for the United States Census 2020.