
St. Mary's
- County:
- Clear Creek County
- County Seat:
- No
- Area (mi²):
- 1.438
- State:
- Colorado
St. Mary's is a CDP located in Clear Creek County, Colorado. St. Mary's has a 2025 population of 214. St. Mary's is currently declining at a rate of -2.28% annually and its population has decreased by -48.56% since the most recent census, which recorded a population of 416 in 2020.
The average household income in St. Mary's is $72,751 with a poverty rate of 0%. The median age in St. Mary's is 31.8 years: 25.5 years for males, and 0 years for females.