Union Square is an unincorporated community and a census-designated place (CDP) located in and governed by Jefferson County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The community is located at the western terminus of U.S. Route 6.
Union Square is bordered by East Pleasant View, Ashwood, and Daniels to the north, Foothills to the south, and Sixth Ave West to the west. It is approximately 8 miles (12.8 km) west of Denver. St. Anthony Hospital is immediately outside of its eastern boundary. McIntyre Gulch flows into the community. US 6 runs west and east and forms a natural boundary to the north.
Union Square is home to Red Rocks Community College including Red Rocks Community College Water Quality Management, Red Rocks School of Fine Woodworking, Warren Tech Central, McLain Community High School, Long View High School, and Jefferson Hills. The community has several hotels such as Sheraton Denver West Hotel, Fairfield Inn & Suites by Marriott Denver West/Federal Center, Hampton Inn Denver West Federal Center, and Home2 Suites by Hilton Denver West – Federal Center, CO. Baldoria on the Water at Van Gordon Street is a notable event venue in the neighborhood.
Parks and green spaces in Union Square include Union Ridge Park, Wright Park, Union Square Park, and Green Mountain Trailhead – McIntyre Gulch.