About St. Mary's County
St. Mary's County is a city located in United States, in the Maryland region. According to the latest available data (2026), the population of St. Mary's County is approximately 114,468 residents, making it the #728 most populous city in United States.
Globally, St. Mary's County ranks #14,043 among the world's most populated cities.
St. Mary's County City Statistics
| City | St. Mary's County |
| Country |  United States |
| Population | 114,468 |
| Global Rank | #14,043 |
| Rank in United States | #728 of 867 cities |
| City Category | city |
| Region | Maryland |
| Latitude | 38.2522 |
| Longitude | -76.5636 |
| Data Year | 2026 |
Where is St. Mary's County Located?
St. Mary's County is located in United States, in the Maryland region, at coordinates 38.2522° latitude and -76.5636° longitude. St. Mary's County sits in the subtropics, typically enjoying warm temperatures year-round.
Nearby Cities
Other Cities in United States
Largest Cities in United States
| # | City | Population |
|---|---|---|
| 1 | Harris County | 4,731,145 |
| 2 | Los Angeles | 3,898,747 |
| 3 | San Diego County | 3,298,634 |
| 4 | Brooklyn | 2,736,074 |
| 5 | Miami-Dade County | 2,701,767 |
Frequently Asked Questions
What is the population of St. Mary's County?
The population of St. Mary's County is approximately 114,468 residents according to the latest available data (2026).
Where is St. Mary's County located?
St. Mary's County is located in United States at approximately 38.2522° latitude and -76.5636° longitude.
Is St. Mary's County one of the largest cities in United States?
With a population of 114,468, St. Mary's County is one of the notable urban areas in United States. It ranks #728 out of 867 cities in the country.
