St. Mary's, CO population, income and ZIP codes

St. Mary's CDP is a very small community in Colorado, with 130 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #399 of 482 ranked by population — larger than 17% of them. The median age here is 31.8 years against 39.1 nationally, a distinctly younger profile, typical of places with students, military posts or a fast-growing family population. At this population the ACS sample is small, so the margin of error around every dollar figure below is wide — treat the numbers as a band, not a point, and expect them to move between annual releases without the place itself changing.

Households in St. Mary's CDP earn a median of $78,854 a year, essentially level with the national figure of $78,538 and 9% below the $86,484 median for the 223 Colorado cities we cover. Household income here is measured before tax and pooled across everyone at the address, which is why it reads higher than typical individual earnings in the same area. Poverty reaches 0% of residents here, less than half the 12.4% national rate.

The typical owner-occupied home in St. Mary's CDP is valued at $406,900, 34.1% above the national figure and 10% below the $453,600 peer median, while median gross rent runs not published a month. The home-price-to-income ratio works out to 5.2×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 78.3% of occupied homes are owner-occupied versus 65% nationally, so the market leans toward owners. Gross rent folds in the utilities a tenant pays separately, so it is closer to the real monthly outlay than a headline rent figure.

With 130 residents, a handful of survey responses moves every median on this page. Compare St. Mary's CDP against its county rather than against national figures.

The Census withheld gross rent for St. Mary's CDP because the sample was too thin to publish at this geography. Those values were suppressed at the source, not lost in our dataset, and we do not model a replacement. Everything else on this page comes straight from the ACS 2019-2023 ACS 5-year tables.