| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Rice | city | Maryland | United States | 39.33 | -77.63 | 830 | |
| Rice Land | city | Maryland | United States | 38.78 | -76.05 | 49 | |
| Richardsmere | city | Maryland | United States | 39.69 | -76.13 | 150 | |
| Richardson Mews | city | Maryland | United States | 39.23 | -76.70 | 104 | |
| Richardson Ridge | city | Maryland | United States | 39.63 | -77.07 | 830 | |
| Richlyn Manor | city | Maryland | United States | 39.42 | -76.44 | 203 | |
| Richwynn Hill | city | Maryland | United States | 39.55 | -76.92 | 830 | |
| Ricketts Ridge | city | Maryland | United States | 39.49 | -76.90 | 830 | |
| Riden | city | Maryland | United States | 39.07 | -76.70 | 193 | |
| Ridervale | city | Maryland | United States | 39.41 | -76.64 | 830 | |
| Riderwood | city | Maryland | United States | 39.41 | -76.65 | 269 | |
| Riderwood Hills | city | Maryland | United States | 39.41 | -76.62 | 403 | |
| Ridge | city | Maryland | United States | 38.12 | -76.37 | 26 | |
| Ridge Crest Estates | city | Maryland | United States | 39.43 | -77.50 | 1076 | |
| Ridge Grove | city | Maryland | United States | 39.38 | -76.53 | 252 | |
| Ridgecrest | city | Maryland | United States | 39.19 | -77.15 | 830 | |
| Ridgecroft | city | Maryland | United States | 39.56 | -76.40 | 830 | |
| Ridgefield | city | Maryland | United States | 39.14 | -76.74 | 200 | |
| Ridgeland Farm Estates | city | Maryland | United States | 39.09 | -77.31 | 393 | |
| Ridgeleigh | city | Maryland | United States | 39.40 | -76.56 | 351 | |
| Ridgely | city | Maryland | United States | 38.95 | -75.88 | 55 | |
| Ridgely Acres | city | Maryland | United States | 38.92 | -75.86 | 42 | |
| Ridgely Estates | city | Maryland | United States | 39.42 | -77.13 | 830 | |
| Ridgely Park | city | Maryland | United States | 39.39 | -76.93 | 830 | |
| Ridgemar | city | Maryland | United States | 39.38 | -76.91 | 830 | |
| Ridgemont | city | Maryland | United States | 39.45 | -76.70 | 830 | |
| Ridgemont | city | Maryland | United States | 39.51 | -76.91 | 830 | |
| Ridges of Stedwick | city | Maryland | United States | 39.17 | -77.22 | 400 | |
| Ridgeview | city | Maryland | United States | 38.71 | -76.56 | 75 | |
| Ridgeview | city | Maryland | United States | 38.54 | -76.82 | 147 | |
| Ridgeview | city | Maryland | United States | 39.59 | -76.39 | 830 | |
| Ridgeview | city | Maryland | United States | 39.16 | -76.70 | 141 | |
| Ridgeview | city | Maryland | United States | 39.65 | -77.38 | 830 | |
| Ridgeview Estates | city | Maryland | United States | 39.51 | -77.04 | 830 | |
| Ridgeville | city | Maryland | United States | 39.37 | -77.17 | 830 | |
| Ridgeway | city | Maryland | United States | 39.11 | -76.68 | 98 | |
| Ridgeway | city | Maryland | United States | 39.27 | -76.76 | 830 | |
| Ridgeway Manor | city | Maryland | United States | 39.22 | -76.65 | 49 | |
| Ridgeways | city | Maryland | United States | 39.34 | -76.99 | 830 | |
| Ridgewood | city | Maryland | United States | 38.34 | -76.76 | 98 | |
| Ridgewood Estates | city | Maryland | United States | 39.39 | -77.14 | 830 | |
| Ridgewood Estates | city | Maryland | United States | 39.14 | -76.73 | 200 | |
| Ridgewood Mobile Home Park | city | Maryland | United States | 39.17 | -76.71 | 108 | |
| Riding Acres | city | Maryland | United States | 38.92 | -75.82 | 19 | |
| Riding Stable Estates | city | Maryland | United States | 39.11 | -76.91 | 400 | |
| Riding Woods | city | Maryland | United States | 39.11 | -76.49 | 49 | |
| Riedel Estates | city | Maryland | United States | 39.02 | -76.68 | 104 | |
| Riggins Corner | city | Maryland | United States | 38.41 | -76.18 | 3 | |
| Ringgold | city | Maryland | United States | 39.71 | -77.57 | 830 | |
| Rio Vista | city | Maryland | United States | 38.78 | -76.21 | 3 | |
| Rio Vista Plaza Mobile Home Park | city | Maryland | United States | 38.82 | -76.69 | 49 | |
| Ripkins Corner | city | Maryland | United States | 39.49 | -76.21 | 49 | |
| Ripley | city | Maryland | United States | 38.54 | -77.08 | 147 | |
| Ripling Waters | city | Maryland | United States | 38.53 | -76.15 | 3 | |
| Rippling Estates | city | Maryland | United States | 39.13 | -76.63 | 52 | |
| Rippling Ridge | city | Maryland | United States | 39.18 | -76.62 | 26 | |
| Riser Place | city | Maryland | United States | 38.81 | -76.06 | 49 | |
| Rising Ridge | city | Maryland | United States | 39.38 | -77.17 | 830 | |
| Rising Sun | city | Maryland | United States | 39.70 | -76.06 | 347 | |
| Rising Sun | city | Maryland | United States | 39.68 | -77.20 | 830 | |
| Rison | city | Maryland | United States | 38.55 | -77.18 | 98 | |
| Rison Acres | city | Maryland | United States | 38.54 | -77.17 | 101 | |
| Ritchie | city | Maryland | United States | 38.87 | -76.86 | 232 | |
| Ritter | city | Maryland | United States | 39.46 | -77.12 | 849 | |
| Ritz Estates | city | Maryland | United States | 39.35 | -77.10 | 830 | |
| Riva | city | Maryland | United States | 38.95 | -76.58 | 9 | |
| Riva Farms | city | Maryland | United States | 38.95 | -76.59 | 49 | |
| Riva Trace | city | Maryland | United States | 38.97 | -76.57 | 49 | |
| Riva Woods | city | Maryland | United States | 38.97 | -76.58 | 45 | |
| Rive Gauche Estates | city | Maryland | United States | 39.07 | -77.31 | 337 | |
| Rivendell | city | Maryland | United States | 39.08 | -76.57 | 3 | |
| River Bend Estates | city | Maryland | United States | 38.98 | -76.17 | 3 | |
| River Bend Estates | city | Maryland | United States | 38.77 | -77.02 | 114 | |
| River Club Estates | city | Maryland | United States | 38.91 | -76.53 | 16 | |
| River Edge | city | Maryland | United States | 39.15 | -76.06 | 3 | |
| River Estates | city | Maryland | United States | 39.09 | -76.13 | 0 | |
| River Farms | city | Maryland | United States | 39.31 | -77.06 | 830 | |
| River Island | city | Maryland | United States | 39.14 | -76.82 | 157 | |
| River Isle Estates | city | Maryland | United States | 38.35 | -75.66 | 16 | |
| River Mills | city | Maryland | United States | 39.28 | -76.81 | 298 | |
| River Park Estates | city | Maryland | United States | 39.34 | -76.95 | 830 | |
| River Plantations | city | Maryland | United States | 39.36 | -77.04 | 830 | |
| River Ridge Estates | city | Maryland | United States | 38.79 | -77.00 | 104 | |
| River Springs | city | Maryland | United States | 38.25 | -76.78 | 3 | |
| River View | city | Maryland | United States | 38.33 | -76.43 | 0 | |
| River Wood Hills | city | Maryland | United States | 39.38 | -77.08 | 830 | |
| Riverdale | city | Maryland | United States | 39.10 | -76.54 | 16 | |
| Riverdale Forest | city | Maryland | United States | 39.10 | -76.55 | 26 | |
| Riverdale Gardens | city | Maryland | United States | 38.97 | -76.91 | 101 | |
| Riverdale Heights | city | Maryland | United States | 38.96 | -76.91 | 101 | |
| Riverdale Hills | city | Maryland | United States | 38.96 | -76.91 | 104 | |
| Riverdale Park | city | Maryland | United States | 38.96 | -76.93 | 42 | |
| Rivers Edge | city | Maryland | United States | 39.26 | -75.86 | 45 | |
| Rivershore | city | Maryland | United States | 39.44 | -76.27 | 3 | |
| Riverside | city | Maryland | United States | 38.39 | -77.15 | 0 | |
| Riverside | city | Maryland | United States | 38.77 | -76.21 | 3 | |
| Riverside | city | Maryland | United States | 39.47 | -76.24 | 39 | |
| Riverside | city | Maryland | United States | 39.17 | -76.89 | 321 | |
| Riverside Estates | city | Maryland | United States | 39.18 | -76.89 | 298 | |
| Riverside Homes | city | Maryland | United States | 38.36 | -75.61 | 19 | |
| Riverside Pines | city | Maryland | United States | 38.35 | -75.62 | 19 | |
| Riverside Village of Church Creek | city | Maryland | United States | 39.47 | -76.24 | 13 | |
| Riverton | city | Maryland | United States | 38.51 | -75.75 | 6 | |
| Riverton | city | Maryland | United States | 38.58 | -76.25 | 3 | |
| Riverton Acres | city | Maryland | United States | 38.50 | -75.74 | 19 | |
| Riverview | city | Maryland | United States | 39.15 | -76.06 | 3 | |
| Riverview | city | Maryland | United States | 38.72 | -77.03 | 16 | |
| Riverview (historical) | city | Maryland | United States | 39.26 | -76.54 | 3 | |
| Riverview Estates | city | Maryland | United States | 38.74 | -77.02 | 49 | |
| Riverview Gardens | city | Maryland | United States | 38.89 | -75.83 | 16 | |
| Riverview Manor | city | Maryland | United States | 39.00 | -76.51 | 3 | |
| Riverview Village | city | Maryland | United States | 38.61 | -77.17 | 98 | |
| Riverwood | city | Maryland | United States | 38.92 | -76.67 | 49 | |
| Riverwood | city | Maryland | United States | 39.35 | -77.36 | 314 | |
| Riverwood | city | Maryland | United States | 39.07 | -77.30 | 206 | |
| Riverwood Farms | city | Maryland | United States | 38.41 | -76.62 | 49 | |
| Riverwood Park | city | Maryland | United States | 39.31 | -76.44 | 3 | |
| Rives | city | Maryland | United States | 38.93 | -76.96 | 131 | |
| Riviera Beach | city | Maryland | United States | 39.17 | -76.51 | 3 | |
| Riviera Isle | city | Maryland | United States | 39.14 | -76.52 | 49 |