There are 11 cities in St. Mary's County, Maryland.
Note: As defined by the US Census Bureau, a city's official boundaries often extend miles beyond the city itself and may even cross county lines. As such, several thousand US cities officially exist in two or more counties (and therefore appear on multiple counties' lists of cities.)
City | Rank | State | 2024 Population | 2020 Census | Annual Change | Density (mi²) | Area (mi²) |
|---|---|---|---|---|---|---|---|
| Lexington Park | 1 | Maryland | 14,140 | 12,934 | 2.18% | 2,332 | 6.06 |
| California | 2 | Maryland | 12,647 | 14,730 | -3.76% | 983 | 12.87 |
| Wildewood | 3 | Maryland | 8,181 | 6,691 | 4.78% | 2,895 | 2.83 |
| Leonardtown | 4 | Maryland | 5,224 | 4,586 | 3.16% | 1,357 | 3.85 |
| Golden Beach | 5 | Maryland | 4,246 | 3,620 | 3.84% | 1,120 | 3.79 |
| Mechanicsville | 6 | Maryland | 1,842 | 1,724 | 1.66% | 355 | 5.19 |
| Charlotte Hall | 7 | Maryland | 1,336 | 1,740 | -2.7% | 264 | 5.06 |
| Callaway | 8 | Maryland | 1,112 | 1,320 | -4.47% | 233 | 4.76 |
| Piney Point | 9 | Maryland | 1,030 | 1,036 | -0.1% | 687 | 1.50 |
| Tall Timbers | 10 | Maryland | 390 | 570 | -10.35% | 288 | 1.35 |
| St. George Island | 11 | Maryland | 0 | 426 | 0% | 0 | 0.79 |
Note: City markers shown outside the county boundary mean that a part of the city extends into this county, but is primarily located in an adjacent county.
Lexington Park is the largest city in St. Mary's County.
St. George Island is the smallest city in St. Mary's County.
There are 11 cities in St. Mary's County, Maryland.