St. Mary's County
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- Population
- 115,126
- Area
- 358.57 sq mi (928.68 km²), 405.69 sq mi water
- Median age
- 37.2
- Households
- 42,436
- Persons per household
- 2.7
- Median household income
- $119,446
- Median house value
- $407,600
Demographics: 2020–2024 ACS
Today
82°F
Chance Showers And Thunderstorms27% precip
Tonight
68°F
Mostly Cloudy then Chance Showers And Thunderstorms31% precip
Saturday
82°F
Chance Showers And Thunderstorms then Slight Chance Showers And Thunderstorms47% precip
Saturday Night
69°F
Chance Showers And Thunderstorms then Showers And Thunderstorms77% precip