St. Mary's County
- Population
- 115,126
- Area
- 0.36 sq mi (0.93 km²), 0.41 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
88°F
Partly Sunny1% precip
Tonight
73°F
Mostly Cloudy2% precip
Sunday
85°F
Partly Sunny then Chance Showers And Thunderstorms68% precip
Sunday Night
72°F
Showers And Thunderstorms81% precip