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| City | Great Mills |
| State | Maryland (MD) |
| County | St. Mary's |
| Country | United States of America |
| Timezone | Eastern Time (America/New_York) |
| Latitude | 38.236792 |
| Longitude | -76.497176 |
| Population | 8,000 |
| Density | 480.0 /km² |
| Incorporated | N/A |
| ZIP Code(s) | 20653, 20634 |
| Area Code | 301, 240 |
| County Seat | Leonardtown |
Great Mills is a locality in St. Mary's County, Maryland, United States. It has a population of approximately 8,000. The population density is 480.0 people per km². Great Mills is located at 38.2368°N, 76.4972°W. It observes the Eastern Time (America/New_York) timezone. ZIP code: 20634.
Great Mills rests on the western edge of St. Mary's County, a landscape shaped by the gentle slope of the land toward the Patuxent River and the Chesapeake Bay beyond. It lies 11.6 miles north-west of Saint Marys, MD (from Saint Marys, MD: bearing 321°T), and is situated 3.1 miles south-west of Lexington Park. Here, the air carries the briny scent of the coast, mingling with the sweet, earthy aroma of rich farmland that has been worked for generations. Towering pines stand sentinel over fields of corn and soybeans, their needles whispering in the ever-present breeze. The roads, often lined with ancient oaks whose branches arch like welcoming arms, curve through a terrain of subtle hills and broad valleys, where sunlight spills across the open spaces and pools in the dappled shade of the wooded areas. The quality of light here, especially in the late afternoon, can be profoundly beautiful, casting long, golden shadows that stretch across the verdant fields and lending a hushed reverence to the quietude of the countryside. The history of Great Mills is deeply entwined with the agricultural heritage of Southern Maryland, a region that has long sustained itself from the bounty of its soil and waters. Early settlers, drawn by the fertile land and access to waterways, established farms and communities that laid the groundwork for the present-day economy, which still relies heavily on agriculture and aquaculture. The presence of the Patuxent River has always been central to life here, providing not only sustenance but also serving as a vital artery for trade and transportation throughout the centuries. Though the landscape has seen its share of change, the enduring spirit of self-reliance and connection to the land remains a defining characteristic of Great Mills, fostering a sense of quiet continuity that resonates through its close-knit neighborhoods and the enduring rhythm of its days.
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This page provides an embedded street and satellite map of Great Mills, Maryland — switch between views using the small square in the bottom left-hand corner of the map. Coordinates: 38.236792, -76.497176. Live weather conditions are sourced directly from the National Weather Service, with current observations and a 7-day forecast also powered by Open-Meteo. Real-time local news and world news feeds keep the page current, while a Wikipedia summary or an editorially written description provides background on Great Mills and St. Mary's County.
Detailed location data for Great Mills includes the ZIP code (20653), telephone area code (301, 240), county seat of St. Mary's County (Leonardtown), and school district assignment. These are among the most commonly searched location details for any US city or town.
Location data is drawn from the USGS Geographic Names Information System (GNIS) and cross-verified against 2020 US Census records by coordinate proximity — ensuring the correct Great Mills is identified even where the name is shared across multiple counties or states. Population figures are sourced from the 2020 US Census.
| Page generated | July 2026 |
| Location data | SimpleMaps US Cities Database; coordinates matched to USGS GNIS definitive data |
| Wikipedia validation | Article content matched to USGS GNIS coordinates via Wikipedia geosearch API. Location verified by proximity — not name matching alone. |