| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Carderock | city | Maryland | United States | 38.98 | -77.19 | 72 | |
| Carderock Springs | city | Maryland | United States | 38.99 | -77.17 | 196 | |
| Cardiff | city | Maryland | United States | 39.63 | -76.13 | 141 | |
| Cardiff | city | Maryland | United States | 39.72 | -76.34 | 830 | |
| Cardinal Forest | city | Maryland | United States | 39.13 | -76.87 | 298 | |
| Cardtown | city | Maryland | United States | 38.54 | -76.02 | 3 | |
| Carea | city | Maryland | United States | 39.70 | -76.51 | 830 | |
| Carey Acres | city | Maryland | United States | 38.45 | -75.54 | 52 | |
| Carey Heights | city | Maryland | United States | 38.36 | -75.57 | 22 | |
| Careytown | city | Maryland | United States | 38.43 | -75.33 | 29 | |
| Carlos | city | Maryland | United States | 39.62 | -78.96 | 1978 | |
| Carlos Junction | city | Maryland | United States | 39.61 | -78.94 | 1988 | |
| Carmae Acres | city | Maryland | United States | 39.38 | -77.00 | 830 | |
| Carmichael | city | Maryland | United States | 38.94 | -76.13 | 49 | |
| Carmody Hills | city | Maryland | United States | 38.90 | -76.89 | 173 | |
| Carmody Hills-Pepper Mill Village | city | Maryland | United States | 38.89 | -76.89 | 200 | |
| Carney | city | Maryland | United States | 39.39 | -76.52 | 314 | |
| Carney Grove | city | Maryland | United States | 39.39 | -76.51 | 239 | |
| Carol Court | city | Maryland | United States | 38.37 | -76.44 | 55 | |
| Carole Acres | city | Maryland | United States | 39.07 | -77.00 | 308 | |
| Carole Highlands | city | Maryland | United States | 38.98 | -76.98 | 141 | |
| Carolina Hills | city | Maryland | United States | 39.28 | -77.36 | 374 | |
| Caroline Acres Mobile Home Park | city | Maryland | United States | 39.07 | -75.77 | 45 | |
| Carpenter Beach | city | Maryland | United States | 38.61 | -76.51 | 0 | |
| Carpenter Point | city | Maryland | United States | 39.54 | -76.01 | 0 | |
| Carriage Hill | city | Maryland | United States | 39.10 | -76.88 | 265 | |
| Carriage Hill Village | city | Maryland | United States | 39.35 | -76.81 | 830 | |
| Carriage Hills | city | Maryland | United States | 38.64 | -76.61 | 98 | |
| Carriage Hills | city | Maryland | United States | 39.58 | -76.94 | 830 | |
| Carriage Hills | city | Maryland | United States | 39.17 | -76.86 | 298 | |
| Carriage Hills | city | Maryland | United States | 39.01 | -76.56 | 98 | |
| Carrico Mill Estates | city | Maryland | United States | 38.50 | -76.80 | 137 | |
| Carrington | city | Maryland | United States | 38.60 | -76.92 | 196 | |
| Carroll | city | Maryland | United States | 39.28 | -76.67 | 144 | |
| Carroll County Trails | city | Maryland | United States | 39.52 | -76.91 | 830 | |
| Carroll Dale | city | Maryland | United States | 39.42 | -76.92 | 830 | |
| Carroll Fields | city | Maryland | United States | 39.37 | -76.97 | 400 | |
| Carroll Heights | city | Maryland | United States | 39.39 | -77.15 | 830 | |
| Carroll Heights | city | Maryland | United States | 39.66 | -77.73 | 830 | |
| Carroll Highlands | city | Maryland | United States | 39.39 | -76.92 | 830 | |
| Carroll Island | city | Maryland | United States | 39.33 | -76.39 | 3 | |
| Carroll Knolls | city | Maryland | United States | 39.02 | -77.05 | 347 | |
| Carroll Lutheran Village | city | Maryland | United States | 39.57 | -77.04 | 830 | |
| Carroll Manor | city | Maryland | United States | 38.98 | -77.00 | 249 | |
| Carroll Manor | city | Maryland | United States | 39.50 | -76.52 | 830 | |
| Carroll Manor Ridge | city | Maryland | United States | 39.51 | -76.50 | 830 | |
| Carroll Meadows | city | Maryland | United States | 39.51 | -76.50 | 830 | |
| Carroll Meadows | city | Maryland | United States | 39.58 | -76.98 | 830 | |
| Carroll Park | city | Maryland | United States | 39.45 | -77.00 | 830 | |
| Carroll Square | city | Maryland | United States | 39.41 | -76.96 | 830 | |
| Carroll View | city | Maryland | United States | 39.63 | -77.26 | 830 | |
| Carroll Winde | city | Maryland | United States | 39.46 | -76.95 | 830 | |
| Carroll Woods Estates | city | Maryland | United States | 39.43 | -77.11 | 830 | |
| Carrolls Addition | city | Maryland | United States | 38.77 | -76.06 | 16 | |
| Carrollton | city | Maryland | United States | 39.56 | -76.92 | 830 | |
| Carrollton | city | Maryland | United States | 39.41 | -77.42 | 298 | |
| Carrollton Manor | city | Maryland | United States | 39.08 | -76.58 | 3 | |
| Carrolltowne | city | Maryland | United States | 39.39 | -76.93 | 830 | |
| Carrollwood | city | Maryland | United States | 39.33 | -76.39 | 3 | |
| Carrollwood Manor | city | Maryland | United States | 39.33 | -76.38 | 3 | |
| Carrollyn Manor | city | Maryland | United States | 39.60 | -77.04 | 830 | |
| Carrs Mill | city | Maryland | United States | 39.31 | -77.05 | 830 | |
| Carrs Ridge | city | Maryland | United States | 38.89 | -76.52 | 3 | |
| Carrs Store (historical) | city | Maryland | United States | 39.57 | -76.78 | 830 | |
| Carsan Knolls | city | Maryland | United States | 39.42 | -77.21 | 830 | |
| Carsin Vale | city | Maryland | United States | 39.52 | -76.23 | 298 | |
| Carsins | city | Maryland | United States | 39.54 | -76.21 | 249 | |
| Carsins Run | city | Maryland | United States | 39.55 | -76.21 | 295 | |
| Carsins Run Estates | city | Maryland | United States | 39.54 | -76.21 | 295 | |
| Carsinwood | city | Maryland | United States | 39.53 | -76.22 | 298 | |
| Carsondale | city | Maryland | United States | 38.94 | -76.85 | 157 | |
| Carters Plains | city | Maryland | United States | 38.81 | -76.06 | 49 | |
| Carthagena Creek | city | Maryland | United States | 38.17 | -76.47 | 3 | |
| Carvel Beach | city | Maryland | United States | 39.17 | -76.53 | 3 | |
| Carville | city | Maryland | United States | 39.05 | -76.00 | 45 |