| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Claggerts Forest | city | Maryland | United States | 39.47 | -76.36 | 193 | |
| Claggettsville | city | Maryland | United States | 39.32 | -77.20 | 830 | |
| Clahamman Hills | city | Maryland | United States | 38.56 | -76.57 | 114 | |
| Claiborne | city | Maryland | United States | 38.84 | -76.28 | 3 | |
| Claibornes Landing | city | Maryland | United States | 38.92 | -76.35 | 3 | |
| Clara | city | Maryland | United States | 38.28 | -75.82 | 3 | |
| Claremont (historical) | city | Maryland | United States | 39.27 | -76.66 | 49 | |
| Clarence Perkins Homes | city | Maryland | United States | 39.29 | -76.60 | 19 | |
| Clarks Landing | city | Maryland | United States | 38.34 | -76.50 | 3 | |
| Clarks Run | city | Maryland | United States | 38.52 | -76.96 | 137 | |
| Clarksbrook Estates | city | Maryland | United States | 39.23 | -77.27 | 830 | |
| Clarksburg | city | Maryland | United States | 39.24 | -77.28 | 830 | |
| Clarksburg Heights | city | Maryland | United States | 39.22 | -77.26 | 830 | |
| Clarkson | city | Maryland | United States | 39.30 | -76.94 | 830 | |
| Clarksville | city | Maryland | United States | 39.21 | -76.94 | 830 | |
| Clarksville Meadows | city | Maryland | United States | 39.19 | -76.91 | 380 | |
| Clarksville Ridge | city | Maryland | United States | 39.18 | -76.91 | 347 | |
| Clarys Forest | city | Maryland | United States | 39.21 | -76.89 | 396 | |
| Clarysville | city | Maryland | United States | 39.64 | -78.89 | 1853 | |
| Claysville | city | Maryland | United States | 39.19 | -77.12 | 830 | |
| Clayton | city | Maryland | United States | 39.45 | -76.35 | 134 | |
| Clayton Manor | city | Maryland | United States | 39.45 | -76.34 | 98 | |
| Clayton Run Estates | city | Maryland | United States | 38.59 | -76.80 | 167 | |
| Clear Acres | city | Maryland | United States | 39.45 | -76.38 | 98 | |
| Clear Ridge | city | Maryland | United States | 39.58 | -77.12 | 830 | |
| Clear Spring | city | Maryland | United States | 39.66 | -77.93 | 830 | |
| Clear Spring Estates | city | Maryland | United States | 39.57 | -76.47 | 830 | |
| Clear View | city | Maryland | United States | 39.60 | -76.84 | 830 | |
| Clear View | city | Maryland | United States | 39.40 | -77.38 | 249 | |
| Clear Water Beach | city | Maryland | United States | 39.17 | -76.53 | 3 | |
| Clearfield | city | Maryland | United States | 39.55 | -76.95 | 830 | |
| Clearspring Manor | city | Maryland | United States | 39.27 | -77.21 | 830 | |
| Clearview | city | Maryland | United States | 39.66 | -76.07 | 308 | |
| Clearview | city | Maryland | United States | 38.81 | -76.06 | 49 | |
| Clearview | city | Maryland | United States | 39.45 | -76.29 | 26 | |
| Clearview | city | Maryland | United States | 39.72 | -77.74 | 830 | |
| Clearview Court | city | Maryland | United States | 39.65 | -76.24 | 400 | |
| Clearview North | city | Maryland | United States | 38.71 | -76.57 | 124 | |
| Clearview Village | city | Maryland | United States | 39.12 | -76.54 | 72 | |
| Cleavers Corner | city | Maryland | United States | 39.27 | -75.98 | 49 | |
| Cleaves Fork | city | Maryland | United States | 39.13 | -75.79 | 45 | |
| Clemens Crossing | city | Maryland | United States | 39.20 | -76.88 | 380 | |
| Clements | city | Maryland | United States | 38.33 | -76.73 | 98 | |
| Clemsonville | city | Maryland | United States | 39.52 | -77.18 | 830 | |
| Cleveland Park Estates | city | Maryland | United States | 38.58 | -76.93 | 200 | |
| Clevelandville | city | Maryland | United States | 39.48 | -77.64 | 830 | |
| Clifford | city | Maryland | United States | 39.25 | -76.63 | 49 | |
| Cliffs City | city | Maryland | United States | 39.12 | -76.15 | 3 | |
| Cliffs of Calvert | city | Maryland | United States | 38.34 | -76.41 | 0 | |
| Cliffton Estates | city | Maryland | United States | 39.56 | -77.50 | 1669 | |
| Clifton | city | Maryland | United States | 39.42 | -77.49 | 830 | |
| Clifton | city | Maryland | United States | 38.77 | -76.06 | 29 | |
| Clifton Knoll | city | Maryland | United States | 39.42 | -77.48 | 830 | |
| Clifton Park Village | city | Maryland | United States | 39.00 | -76.99 | 200 | |
| Clifton on the Potomac | city | Maryland | United States | 38.37 | -76.97 | 29 | |
| Cliftonbrook | city | Maryland | United States | 39.14 | -76.99 | 830 | |
| Clinton | city | Maryland | United States | 38.77 | -76.90 | 246 | |
| Clinton Acres | city | Maryland | United States | 38.73 | -76.88 | 147 | |
| Clinton Heights | city | Maryland | United States | 38.76 | -76.86 | 216 | |
| Clinton Hills | city | Maryland | United States | 38.71 | -76.96 | 101 | |
| Clinton Woods | city | Maryland | United States | 38.74 | -76.90 | 150 | |
| Clipper Hill Estates | city | Maryland | United States | 39.38 | -76.93 | 400 | |
| Cloisters | city | Maryland | United States | 39.39 | -76.63 | 830 | |
| Clopper | city | Maryland | United States | 39.15 | -77.24 | 396 | |
| Clover Dale Acres | city | Maryland | United States | 38.35 | -76.76 | 98 | |
| Clover Field | city | Maryland | United States | 39.61 | -76.47 | 830 | |
| Clover Hill | city | Maryland | United States | 39.46 | -77.43 | 347 | |
| Cloverberry | city | Maryland | United States | 39.65 | -77.16 | 830 | |
| Cloverdale | city | Maryland | United States | 39.53 | -76.43 | 410 | |
| Cloverdale | city | Maryland | United States | 39.46 | -77.43 | 351 | |
| Cloverdale Farm | city | Maryland | United States | 38.38 | -75.56 | 32 | |
| Cloverfield | city | Maryland | United States | 39.57 | -76.63 | 374 | |
| Cloverfield Manor | city | Maryland | United States | 39.40 | -76.50 | 298 | |
| Cloverfields | city | Maryland | United States | 39.00 | -76.30 | 26 | |
| Cloverlea | city | Maryland | United States | 38.88 | -76.51 | 0 | |
| Cloverly | city | Maryland | United States | 39.11 | -77.00 | 830 | |
| Cloverton | city | Maryland | United States | 39.61 | -77.81 | 830 | |
| Cloverview | city | Maryland | United States | 39.46 | -77.42 | 347 | |
| Clubhouse Estates | city | Maryland | United States | 38.90 | -76.57 | 88 | |
| Clumber | city | Maryland | United States | 39.02 | -76.55 | 98 | |
| Clydesdale Acres | city | Maryland | United States | 39.52 | -76.86 | 830 |