City in Marion County, Kentucky · 0.8 sq mi · 176 people per sq mi
137 people live in St. Mary. The typical household earns $47,500, and the median resident is 34.6 years old.
2026 projection
From 138 in 2020
Poverty rate 3.4%
Men 37 · Women 31.2
2010–2026
137
2026 projection
0.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2010–2026
137
2026 projection
0.7% since 2020 (decrease)
Source: U.S. Census Bureau decennial counts and annual estimates, including 2010–2020 intercensal estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 137 | -1 | 0.72% |
|---|---|---|---|
| 2025 | 138 | 0 | 0.00% |
| 2024 | 138 | 0 | 0.00% |
| 2023 | 138 | 0 | 0.00% |
| 2022 | 138 | -1 | 0.72% |
| 2021 | 139 | +1 | 0.72% |
| 2020 | 138 | +1 | 0.73% |
| 2019 | 137 | 0 | 0.00% |
| 2018 | 137 | +2 | 1.48% |
| 2017 | 135 | +2 | 1.50% |
Showing 10 of 17 years.
The 2020 row compares the April 1 Census count with the July 1, 2019 estimate (about nine months). Its Growth and Annual change therefore do not represent a full year.
St. Mary has a population change lower than Marion County, Kentucky, and the U.S.
Change from July 1, 2020 to July 1, 2025 population estimates—not annualized growth or site projections.
Source: U.S. Census Bureau. U.S. totals are summed from the 50 states and D.C.; unavailable comparisons are omitted.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 1 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
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 29 residents
66% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 66% | 75% | 57% |
| Never married | 17% | 23% | 12% |
| Divorced | 17% | 2% | 31% |
| Widowed | 0% | 0% | 0% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources