City in Gratiot County, Michigan · 3.3 sq mi · 2,235 people per sq mi
7,409 people live in St. Louis. The typical household earns $51,167, and the median resident is 37.5 years old.
2026 projection
From 7,010 in 2020
Poverty rate 13.4%
Men 37.4 · Women 38.6
1870–2026
7,409
2026 projection
5.7% since 2020 (increase)
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.
1870–2026
7,409
2026 projection
5.7% since 2020 (increase)
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 | 7,409 | +3 | 0.04% |
|---|---|---|---|
| 2025 | 7,406 | -56 | 0.75% |
| 2024 | 7,462 | -8 | 0.11% |
| 2023 | 7,470 | +217 | 2.99% |
| 2022 | 7,253 | +83 | 1.16% |
| 2021 | 7,170 | +160 | 2.28% |
| 2020 | 7,010 | -151 | 2.11% |
| 2019 | 7,161 | +127 | 1.81% |
| 2018 | 7,034 | -165 | 2.29% |
| 2017 | 7,199 | +247 | 3.55% |
Showing 10 of 31 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. Louis has a population change higher than Gratiot County, and lower than Michigan 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 74 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 7 residents
24% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 24% | 19% | 42% |
| Never married | 53% | 60% | 28% |
| Divorced | 16% | 15% | 19% |
| Widowed | 5% | 3% | 12% |
| Separated | 2% | 3% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
14 sources