Founded in 1658, Charles County is one of 23 counties in the state of Maryland. Historically, Charles County was formed from unorganized territory. The city of La Plata is the county seat. With FIPS code of 17, Charles County has a population of 168,698 and area of 643 square miles (1,665 km2).
List of all cities in Charles County, MD alphabetically
| City/Town | Postal Code | Area Code |
| Bel Alton, MD | 20611 | 301/240/227 |
| Benedict, MD | 20612 | 301/240/227 |
| Bryans Road, MD | 20616 | 301/240/227 |
| Bryantown, MD | 20617 | 301/240/227 |
| Cobb Island, MD | 20625 | 301/240/227 |
| Dentsville, MD | 20646 | 301/240/227 |
| Faulkner, MD | 20632 | 301/240/227 |
| Hughesville, MD | 20637 | 301/240/227 |
| Indian Head, MD | 20640 | 301/240/227 |
| Ironsides, MD | 20643 | 301/240/227 |
| Issue, MD | 20645 | 301/240/227 |
| La Plata, MD | 20646 | 301/240/227 |
| Marbury, MD | 20658 | 301/240/227 |
| Marshall Hall, MD | 20616 | 301/240/227 |
| Mount Victoria, MD | 20661 | 301/240/227 |
| Nanjemoy, MD | 20662 | 301/240/227 |
| Newburg, MD | 20664 | 301/240/227 |
| 20682 | 301/240/227 | |
| Pisgah, MD | 20640 | 301/240/227 |
| Pomfret, MD | 20675 | 301/240/227 |
| Port Tobacco, MD | 20677 | 301/240/227 |
| Rison, MD | 20658 | 301/240/227 |
| Rock Point, MD | 20682 | 301/240/227 |
| Saint Charles, MD | 20602 | 301/240/227 |
| 20603 | 301/240/227 | |
| 20604 | 301/240/227 | |
| Swan Point, MD | 20645 | 301/240/227 |
| Waldorf, MD | 20601 | 301/240/227 |
| 20602 | 301/240/227 | |
| 20603 | 301/240/227 | |
| 20604 | 301/240/227 | |
| Welcome, MD | 20693 | 301/240/227 |
| White Plns, MD | 20695 | 301/240/227 |