| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Cascade | city | Maryland | United States | 39.71 | -77.49 | 1669 | |
| Cascade Estates | city | Maryland | United States | 39.62 | -76.91 | 869 | |
| Cash Corner | city | Maryland | United States | 37.99 | -75.81 | 3 | |
| Cash Corner (historical) | city | Maryland | United States | 39.40 | -75.84 | 49 | |
| Cashell Estates | city | Maryland | United States | 39.14 | -77.14 | 374 | |
| Cashell Manor | city | Maryland | United States | 39.14 | -77.09 | 830 | |
| Cashell Woods | city | Maryland | United States | 39.13 | -77.08 | 830 | |
| Cassatt | city | Maryland | United States | 38.08 | -75.58 | 3 | |
| Casselman | city | Maryland | United States | 39.68 | -79.17 | 2509 | |
| Cassidy Wharf | city | Maryland | United States | 39.38 | -75.96 | 3 | |
| Castle Acres | city | Maryland | United States | 38.86 | -76.61 | 147 | |
| Castle Haven | city | Maryland | United States | 38.63 | -76.17 | 3 | |
| Castle Haven Estates | city | Maryland | United States | 38.15 | -75.41 | 19 | |
| Castle Manor | city | Maryland | United States | 38.95 | -76.96 | 49 | |
| Castle Marina | city | Maryland | United States | 38.98 | -76.28 | 3 | |
| Castle Oaks | city | Maryland | United States | 39.59 | -76.86 | 830 | |
| Castlegate | city | Maryland | United States | 39.09 | -76.93 | 347 | |
| Castlemore | city | Maryland | United States | 38.66 | -76.67 | 98 | |
| Castles Rising | city | Maryland | United States | 39.52 | -76.90 | 830 | |
| Castleton | city | Maryland | United States | 39.67 | -76.21 | 298 |