| Official Zip Code Name | Great Mills |
| Zip Code State | Maryland |
| Primary County: | Saint Marys |
| Area Code | 240/301 |
| Current Population: | 37081 |
| Racial Majority: | White 62.49% |
| Median Household Income | $55618 |
| Average Adjusted Gross Income | $89060 |
| Time Zone: | 5 |
| Elevation Range | 96 ft. |
| Area | 6.991 Sqm. |
| Coordinates(Y,X) | 38.243081, -76.494239 |