Total Population in St. Mary's County, MD
ACS 2024 5-Year Estimates
115,126
Rank #548/3,222 · #12 in MD
83th
St. Mary's 115,126
MD 6,206,011 -98.1%
US 330M
Total Population Trend
Rankings →Percentile Rank Over Time
Year-over-Year Population Change
National Distribution
How St. Mary's County's total population of 115,126 compares to all 3,222 U.S. counties. Values range from 33 to 9,808,667.
Distribution of Total Population Across All Counties
Ranking Context
Counties ranked closest to St. Mary's County for total population.
Nearby Rankings
Full ranking →| #545 | Wayne County, OH | 116,588 |
| #546 | Calhoun County, AL | 116,090 |
| #547 | Potter County, TX | 115,975 |
| #548 | St. Mary's County, MD | 115,126 |
| #549 | Jefferson County, NY | 115,040 |
| #550 | Albemarle County, VA | 114,919 |
| #551 | Pennington County, SD | 113,512 |
About Total Population
St. Mary's County, Maryland has a total population of 115,126, ranking #548 of 3,222 counties nationwide — 100.0% below the national value of 330M. Within Maryland, it ranks #12 of 24. This places it in the 83th percentile nationally.
Total population count from the American Community Survey. Source: U.S. Census Bureau, American Community Survey 2024 5-Year Estimates. All values are estimates derived from survey samples and are subject to margin of error. For more information, see our methodology.