St. Mary's is a community in Clear Creek County, Colorado, home to about 68 people across 1.4 square miles. It has no ZIP code of its own: it’s part of 80452.
Homes sold for a median of $344 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Idaho Springs; part is in St. Mary's
Each card is that ZIP code’s whole market, including any part outside St. Mary's. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up St. Mary's’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows St. Mary's well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Denver International Airport (DEN)50 miles away |
|---|---|
| Closer regional airport | Rocky Mountain Metropolitan Airport (BJC)28 miles away |
| Nearest city of 250,000+ | Denver, CO38 miles away |
| Nearest city of 1 million+ | Phoenix, AZ557 miles away |
Straight-line distances from the center of St. Mary's; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
St. Mary's had 333 residents in the 2020 census, up 33% since 2000.
It’s the 431st largest of 472 towns in Colorado by population.
Clear Creek County grew from 7,082 residents in 1900 to 9,397 in 2020.
Clear Creek County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 77°F in summer, and winter lows average 15°F. About 18.3 inches of rain and melted snow fall in a typical year, with about 106 inches of snow.
Source: NOAA 1991–2020 climate normals, Georgetown, CO weather station (6 miles away).
3,044 jobs at 340 businesses in Clear Creek County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
12 doctors and other health care providers list an office in St. Mary's.
Nearest hospitals
Providers with an office here
| Dentists | 4 |
|---|---|
| Nurse practitioners and physician assistants | 3 |
| Mental health providers | 3 |
| Chiropractors | 2 |
| Pharmacies | 2 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Grocery stores
Libraries
Museums
Counts are within about 1 mile of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Clear Creek School District No. Re-1. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Carlson Elementary SchoolIdaho Springs | Pre-K–6 | 144 | Public | 4.0 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Idaho Springs and Blue Valley.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.