| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Colbourn Manor | city | Maryland | United States | 38.33 | -75.60 | 19 | |
| Colbourne | city | Maryland | United States | 38.26 | -75.45 | 29 | |
| Colchester on the Severn | city | Maryland | United States | 39.07 | -76.57 | 3 | |
| Cold Saturday | city | Maryland | United States | 39.49 | -76.90 | 830 | |
| Cold Spring | city | Maryland | United States | 39.35 | -76.66 | 308 | |
| Coldstream | city | Maryland | United States | 39.70 | -76.49 | 830 | |
| Coldstream | city | Maryland | United States | 39.41 | -77.31 | 301 | |
| Cole (historical) | city | Maryland | United States | 39.46 | -76.13 | 3 | |
| Colebrook | city | Maryland | United States | 39.41 | -77.55 | 830 | |
| Colebrooke | city | Maryland | United States | 38.84 | -76.95 | 249 | |
| Coleman | city | Maryland | United States | 39.34 | -76.08 | 49 | |
| Coles Corner | city | Maryland | United States | 38.78 | -76.87 | 249 | |
| Colesville | city | Maryland | United States | 39.08 | -77.00 | 357 | |
| Colesville Heights | city | Maryland | United States | 39.11 | -76.99 | 830 | |
| Colesville Manor | city | Maryland | United States | 39.09 | -77.00 | 416 | |
| Colesville Park | city | Maryland | United States | 39.10 | -77.00 | 830 | |
| Colgate | city | Maryland | United States | 39.30 | -76.52 | 49 | |
| Colgate | city | Maryland | United States | 39.27 | -76.56 | 16 | |
| Colgate Creek | city | Maryland | United States | 39.27 | -76.54 | 3 | |
| College Estates | city | Maryland | United States | 39.43 | -77.42 | 308 | |
| College Heights | city | Maryland | United States | 38.98 | -76.94 | 98 | |
| College Heights Estates | city | Maryland | United States | 38.98 | -76.95 | 98 | |
| College Hills | city | Maryland | United States | 39.25 | -76.73 | 351 | |
| College Hills | city | Maryland | United States | 39.05 | -76.50 | 49 | |
| College Manor | city | Maryland | United States | 39.05 | -76.50 | 98 | |
| College Park | city | Maryland | United States | 38.98 | -76.94 | 55 | |
| College Park Woods | city | Maryland | United States | 39.01 | -76.95 | 147 | |
| College Station | city | Maryland | United States | 39.05 | -76.52 | 49 | |
| College View | city | Maryland | United States | 39.04 | -77.07 | 374 | |
| Collington | city | Maryland | United States | 38.97 | -76.76 | 147 | |
| Collingwood | city | Maryland | United States | 38.26 | -76.75 | 3 | |
| Collins Estates | city | Maryland | United States | 39.42 | -76.96 | 830 | |
| Collison Corner | city | Maryland | United States | 38.92 | -76.55 | 65 | |
| Collmus | city | Maryland | United States | 39.41 | -77.26 | 830 | |
| Colmar Manor | city | Maryland | United States | 38.93 | -76.95 | 39 | |
| Colonial Acres | city | Maryland | United States | 39.63 | -75.85 | 98 | |
| Colonial Acres | city | Maryland | United States | 38.38 | -75.52 | 49 | |
| Colonial Acres | city | Maryland | United States | 39.52 | -76.33 | 301 | |
| Colonial Gardens | city | Maryland | United States | 39.28 | -76.76 | 830 | |
| Colonial Heights | city | Maryland | United States | 38.78 | -76.07 | 16 | |
| Colonial Heights | city | Maryland | United States | 39.63 | -77.40 | 830 | |
| Colonial Hills | city | Maryland | United States | 39.68 | -77.11 | 830 | |
| Colonial Manor | city | Maryland | United States | 39.13 | -76.67 | 124 | |
| Colonial Manor Estates | city | Maryland | United States | 38.98 | -76.49 | 3 | |
| Colonial Manor Trailer Park | city | Maryland | United States | 39.03 | -76.47 | 55 | |
| Colonial Park | city | Maryland | United States | 39.31 | -76.72 | 298 | |
| Colonial Park | city | Maryland | United States | 39.63 | -77.70 | 830 | |
| Colonial Village | city | Maryland | United States | 39.36 | -76.71 | 830 | |
| Colony Acres | city | Maryland | United States | 39.65 | -76.08 | 367 | |
| Colony Fairfield | city | Maryland | United States | 39.12 | -76.76 | 209 | |
| Colony Hills | city | Maryland | United States | 38.97 | -76.50 | 3 | |
| Colony Ridge | city | Maryland | United States | 39.07 | -76.68 | 196 | |
| Colony Square | city | Maryland | United States | 38.26 | -76.45 | 98 | |
| Colony Village | city | Maryland | United States | 39.48 | -77.35 | 298 | |
| Colora | city | Maryland | United States | 39.67 | -76.10 | 324 | |
| Coltons Point | city | Maryland | United States | 38.22 | -76.75 | 0 | |
| Columbia | city | Maryland | United States | 39.24 | -76.84 | 354 | |
| Columbia Beach | city | Maryland | United States | 38.82 | -76.50 | 0 | |
| Columbia Forest | city | Maryland | United States | 38.99 | -77.09 | 298 | |
| Columbia Hills | city | Maryland | United States | 39.24 | -76.83 | 403 | |
| Columbia Park | city | Maryland | United States | 38.92 | -76.89 | 141 | |
| Columbia Park | city | Maryland | United States | 38.59 | -77.01 | 147 |