St. Mary's, Colorado

St. Mary's is a census-designated place (CDP) located in and governed by Clear Creek County, Colorado, United States. The CDP is a part of the Denver–Aurora–Lakewood, CO Metropolitan Statistical Area. The population of the St. Mary's CDP was 333 at the United States Census 2020. The St. Mary's Glacier Metropolitan District and the St. Mary's Glacier Water & Sanitation District provide services. The Idaho Springs post office (Zip Code 80452) serves the area.

Geography
The St. Mary's CDP has an area of 3.744 km2, including 0.018 km2 of water.

Demographics
The United States Census Bureau initially defined the St. Mary's CDP for the United States Census 2000.

Historic ski area

 * St. Mary's Glacier Ski Area