| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Robbins | city | Maryland | United States | 38.38 | -76.08 | 3 | |
| Robbins Landing | city | Maryland | United States | 38.38 | -76.06 | 3 | |
| Roberts | city | Maryland | United States | 39.63 | -78.80 | 830 | |
| Roberts | city | Maryland | United States | 39.12 | -75.92 | 49 | |
| Roberts Field | city | Maryland | United States | 39.60 | -76.84 | 830 | |
| Roberts Mill Run | city | Maryland | United States | 39.66 | -77.16 | 830 | |
| Roberts Retreat | city | Maryland | United States | 39.41 | -77.49 | 830 | |
| Robeys Farmlets | city | Maryland | United States | 39.09 | -76.88 | 249 | |
| Robie Manor | city | Maryland | United States | 38.60 | -77.01 | 147 | |
| Robin Acres | city | Maryland | United States | 39.62 | -76.07 | 400 | |
| Robin Hood Hill | city | Maryland | United States | 39.03 | -76.54 | 16 | |
| Robin Hood Manor | city | Maryland | United States | 39.54 | -76.14 | 95 | |
| Robin Meadows | city | Maryland | United States | 39.37 | -77.43 | 298 | |
| Robindale | city | Maryland | United States | 39.06 | -77.09 | 275 | |
| Robindell Heights | city | Maryland | United States | 39.41 | -77.15 | 830 | |
| Robinson | city | Maryland | United States | 39.08 | -76.55 | 6 | |
| Robinson Corner | city | Maryland | United States | 39.29 | -76.01 | 49 | |
| Robinsons Promise | city | Maryland | United States | 39.13 | -76.84 | 249 | |
| Robinwood | city | Maryland | United States | 38.95 | -76.51 | 22 | |
| Robinwood | city | Maryland | United States | 39.64 | -77.66 | 830 | |
| Roblee Acres | city | Maryland | United States | 38.82 | -76.81 | 147 | |
| Robshire Manor | city | Maryland | United States | 38.58 | -76.60 | 49 |