CDP in Glacier County, Montana · 0.8 sq mi · 342 people per sq mi
About 260 people live in St. Mary. The median resident is 25.8 years old.
2026 projection
From 579 in 2020
Poverty rate 61.85%
Men 25.5 · Women 43.3
2020–2026
257
2026 projection
55.6% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2020–2026
257
2026 projection
55.6% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 257 | +16 | 6.64% |
|---|---|---|---|
| 2025 | 241 | +32 | 7.38% |
| 2023 | 209 | -33 | 13.64% |
| 2022 | 242 | -249 | 50.71% |
| 2021 | 491 | -88 | 15.20% |
| 2020 | 579 | — | — |
Showing 6 of 6 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 2 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
20% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 20% | 9% | 32% |
| Never married | 80% | 91% | 68% |
| Divorced | 0% | 0% | 0% |
| Widowed | 0% | 0% | 0% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
7 sources, all from the U.S. Census Bureau