St. Mary's County, Maryland

MD · FIPS 24037 · ACS 2024 5-Year Estimates

Key Statistics

Total Population
115,126
Rank #548 of 3,222
83th %ile
Median Household Income
$119,446 +58.9% vs nat'l
Rank #56 of 3,222
98th %ile
Poverty Rate
8.0% −36.7% vs nat'l
Rank #357 of 3,222
89th %ile
Median Home Value
$407,600 +44.6% vs nat'l
Rank #275 of 3,222
91th %ile
Bachelor's Degree or Higher
36.5% +8.2% vs nat'l
Rank #404 of 3,222
87th %ile
Unemployment Rate
3.4% −36.0% vs nat'l
Rank #917 of 3,222
72th %ile

At a Glance

73.2% Homeownership
96.1% Insured
36.5% Bachelor's+

Age & Sex Distribution

MaleFemale
0-910-1920-2930-3940-4950-5960-6970-7980+10%5%0%5%10%

Race & Ethnicity

White (non-Hispanic)Black (non-Hispanic)Hispanic or LatinoTwo or More RacesAsian (non-Hispanic)Other (non-Hispanic)American Indian (non-Hispanic)Native Hawaiian/Pacific Islander0.0%17.4%34.7%52.1%69.5%70.3%14.6%6.1%5.9%2.6%0.5%0.1%0.0%

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.

About this data

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates (2024). All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.