St. Mary's County, Maryland
St. Mary's County, Maryland · ZIP 20606, 20609, 20618
- Census data · ACS 2019-2023
- 116,469 (2024 estimate)Population
- 41,743Households
- $114,580Median household income
- $390,900Median home value
- 11Towns with a page
- 27ZIP codes
St. Mary's County in numbersOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 86,211 |
| 2010 | 105,151 |
| 2020 | 113,777 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, county level, state 24, retrieved November 14, 2026; Census 2010 Summary File 1: total population, county level, state 24, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, county level, state 24, retrieved November 14, 2026.
Median household income $114,580 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, county level, state 24, retrieved November 14, 2026.
- Owner occupied
- 30,325 units
- Renter occupied
- 11,418 units
- Vacancy rate
- 9.4%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, county level, state 24, retrieved November 14, 2026.
32,683 employees in 2,090 establishments with payroll in 2023, all sectors; employers themselves are not named in the source. County Business Patterns counts are published with noise.
Source: County Business Patterns 2023: employment by sector, county level, state 24, retrieved November 14, 2026.
| Measure | St. Mary's County | Maryland |
|---|---|---|
| Population | 114,372 | 6,170,738 |
| Median household income | $114,580 | $101,652 |
| Median age | 37.0 | 39.3 |
| Median home value | $390,900 | $397,700 |
| Bachelor’s degree or higher | 35.1% | 42.7% |
| Foreign-born residents | 4.5% | 16.3% |
| Owner-occupied homes | 72.6% | 67.5% |
| Mean commute to work | 30.4 minutes | 31.5 minutes |
Source: American Community Survey 5-year data profile 2019–2023, county level, state 24, retrieved November 14, 2026.
Townships, towns and villages in St. Mary's County11 with a page · sort by any column
| Type | |||
|---|---|---|---|
| Lexington Park | Census designated place | 13,419 | 6.06 sq mi |
| California | Census designated place | 13,223 | 12.9 sq mi |
| Wildewood | Census designated place | 7,765 | 2.85 sq mi |
| Leonardtown | Town | 5,041 | 3.85 sq mi |
| Golden Beach | Census designated place | 3,953 | 3.79 sq mi |
| Mechanicsville | Census designated place | 1,521 | 5.19 sq mi |
| Charlotte Hall | Census designated place | 1,448 | 5.06 sq mi |
| Piney Point | Census designated place | 1,171 | 1.50 sq mi |
| Callaway | Census designated place | 1,087 | 4.76 sq mi |
| Tall Timbers | Census designated place | 532 | 1.35 sq mi |
| St. George Island | Census designated place | 38 | 0.79 sq mi |
Populations: Census Population Estimates, Vintage 2024: subcounty totals, state 24 (2024). Land areas: Census Gazetteer 2025: counties. A dash means the figure is not in the cited file.
County officialsFrom public records
No county official is published yet. Names appear once a researcher drafts them from the county’s own site and a second person approves; office contacts only, never personal details.
Across St. Mary's County
No job is posted in St. Mary's County’s towns yet. Employers post from their business dashboard; public job banks are added once their terms are recorded.
No upcoming event is listed in St. Mary's County's towns yet. Members and businesses add events from any town page.
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Neighboring counties
Neighboring counties
- Calvert CountyPopulation 94,913 (2024 estimate)
- Charles CountyPopulation 174,478 (2024 estimate)
- Dorchester CountyPopulation 33,138 (2024 estimate)
- Northumberland CountyPopulation 12,397 (2024 estimate)
- Somerset CountyPopulation 25,241 (2024 estimate)
- Westmoreland CountyPopulation 19,235 (2024 estimate)
Sources: Census county adjacency file 2024, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 24, retrieved November 14, 2026; Census Population Estimates, Vintage 2024: subcounty totals, state 51, retrieved November 14, 2026.