Population
St. Mary's County has a population of 115,281 as of 2023. It is located in Maryland.
Demographics
The following demographic data represents the racial and ethnic composition of St. Mary's County based on the most recent Census Bureau estimates.
Race & Ethnicity
Race & Ethnicity Breakdown
| Race/Ethnicity | Percentage | Population |
|---|---|---|
| White | 73.6% | 84,847 |
| Black or African American | 14.4% | 16,600 |
| Two or More Races | 7.6% | 8,761 |
| Hispanic or Latino | 5.7% | 6,571 |
| Asian | 2.5% | 2,882 |
| Some Other Race | 1.8% | 2,075 |
| American Indian/Alaska Native | 0.1% | 115 |
| Native Hawaiian/Pacific Islander | 0.0% | 0 |
Marital Status (Age 15+)
Economics & Income
Economic indicators and income statistics for St. Mary's County based on American Community Survey 5-Year Estimates.
Income & Poverty
| Type | Median Income | Mean Income |
|---|---|---|
| Households | $113,668 | $134,383 |
| Families | $132,926 | $148,387 |
| Married-couple Families | $132,926 | $148,877 |
| Nonfamily Households | $69,830 | $75,416 |
Sources
All data presented on this page is sourced from official U.S. government sources and is accurate as of 2023. Data is updated annually when new estimates become available.
Population, demographics, income, poverty, and age data for St. Mary's County, Maryland.
Annual population estimates for counties.
Official population counts and demographic data from the decennial census.
Data Methodology
The statistics shown are estimates from the American Community Survey (ACS) and Population Estimates Program. Margins of error apply but are not shown. For the most current and detailed data, please visit the U.S. Census Bureau website.