St. Mary's County, Maryland
MD · FIPS 24037 · ACS 2024 5-Year Estimates
| Metric | Value | vs National | Rank | Percentile |
|---|---|---|---|---|
| Total Population | 115,126 | — | #548 / 3,222 | |
| Median Household Income | $119,446 | +58.9% | #56 / 3,222 | |
| Median Age | 37.2 years | -4.4% | #2,719 / 3,222 | |
| Median Home Value | $407,600 | +44.6% | #275 / 3,222 | |
| Median Gross Rent | $1,747 | +50.2% | #117 / 3,222 | |
| Poverty Rate | 8.0% | -36.7% | #357 / 3,222 | |
Demographics
St. Mary's County has a population of 115,126, making it the #548 most populous county in the US. The median age is 37.2 years, which is 4.4% below the national median.
Population Trend
Rankings →Year-over-Year Population Growth
Age & Sex Distribution
Race & Ethnicity
Nativity
Household Type
Economy
The median household income in St. Mary's County is $119,446, ranking #56 out of 3,222 counties — 58.9% above the national median. The poverty rate is 8.0% and unemployment stands at 3.4%.
Median Household Income Trend
Rankings →Poverty Rate Trend
Rankings →Housing
The median home value in St. Mary's County is $407,600 (+44.6% vs national). Renters pay a median of $1,747/mo and the homeownership rate is 73.2%.
Median Home Value Trend
Rankings →Health
96.1% of residents in St. Mary's County have health insurance coverage, which is 4.8% above the national rate.
About St. Mary's County, Maryland
St. Mary's County, Maryland has a total population of 115,126, making it the 548th most populous county in the United States. The median age in St. Mary's County is 37.2 years, which is 4.4% below the national median of 38.9 years.
The median household income in St. Mary's County is $119,446, which ranks #56 of 3,222 counties nationwide. This is 58.9% above the national median of $75,149. The poverty rate is 8.0%, lower than the national rate of 12.6%. The unemployment rate stands at 3.4%.
The median home value in St. Mary's County is $407,600, 44.6% above the national median. Renters in St. Mary's County pay a median gross rent of $1,747 per month. The homeownership rate is 73.2%, compared to the national rate of 64.4%.
In St. Mary's County, 36.5% of residents aged 25 and older hold a bachelor's degree or higher, 8.2% above the national average of 33.7%. Health insurance coverage stands at 96.1% of the population. The average commute time for workers is 32.6 min.
St. Mary's County is a diverse community. The largest racial or ethnic group is White (non-Hispanic) at 70.3% of the population, followed by Black (non-Hispanic) (14.6%) and Hispanic or Latino (6.1%).
All data for St. Mary's County, Maryland comes from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates. These figures are estimates based on survey sampling and are subject to margin of error. For the most detailed and up-to-date data, visit the Census Bureau's official data portal.