| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|---|---|---|---|---|---|---|
| Waddells Corner | city | Maryland | United States | 38.65 | -75.90 | 39 | |
| Waggaman Heights | city | Maryland | United States | 38.81 | -76.94 | 147 | |
| Wagner Landing | city | Maryland | United States | 38.28 | -75.73 | 19 | |
| Wagners Crossroads | city | Maryland | United States | 39.57 | -77.65 | 830 | |
| Wagners Mill | city | Maryland | United States | 39.56 | -77.06 | 830 | |
| Waibelwood Park | city | Maryland | United States | 39.63 | -76.09 | 830 | |
| Wakefield | city | Maryland | United States | 39.56 | -77.07 | 830 | |
| Wakefield | city | Maryland | United States | 39.45 | -76.59 | 275 | |
| Wakefield | city | Maryland | United States | 38.60 | -76.89 | 190 | |
| Wakefield | city | Maryland | United States | 39.31 | -76.70 | 308 | |
| Wakefield Estates | city | Maryland | United States | 39.53 | -77.05 | 830 | |
| Wakefield Manor | city | Maryland | United States | 39.53 | -76.35 | 298 | |
| Wakefield Meadows | city | Maryland | United States | 39.52 | -76.34 | 347 | |
| Wakefield Mill | city | Maryland | United States | 39.57 | -77.07 | 830 | |
| Wakefield Valley | city | Maryland | United States | 39.56 | -77.03 | 830 | |
| Wakely Terrace | city | Maryland | United States | 39.53 | -76.33 | 341 | |
| Walbrook | city | Maryland | United States | 39.31 | -76.67 | 183 | |
| Walbrook Manor | city | Maryland | United States | 39.66 | -76.82 | 830 | |
| Walden | city | Maryland | United States | 39.03 | -76.67 | 121 | |
| Walden Circle | city | Maryland | United States | 39.30 | -76.73 | 830 | |
| Walden Farms | city | Maryland | United States | 39.60 | -77.21 | 830 | |
| Waldorf | city | Maryland | United States | 38.62 | -76.94 | 196 | |
| Wales of Harford | city | Maryland | United States | 39.56 | -76.43 | 830 | |
| Waljacks Corners | city | Maryland | United States | 38.92 | -75.96 | 26 | |
| Walker | city | Maryland | United States | 39.66 | -76.67 | 830 | |
| Walker Hill | city | Maryland | United States | 39.11 | -76.89 | 301 | |
| Walker Manor | city | Maryland | United States | 39.66 | -76.70 | 830 | |
| Walker Mill | city | Maryland | United States | 38.88 | -76.89 | 249 | |
| Walkers Choice | city | Maryland | United States | 39.16 | -77.21 | 400 | |
| Walkers Run | city | Maryland | United States | 39.71 | -76.78 | 849 | |
| Walkersville | city | Maryland | United States | 39.49 | -77.35 | 298 | |
| Walkertown | city | Maryland | United States | 38.79 | -76.04 | 49 | |
| Wallace Estates | city | Maryland | United States | 38.75 | -76.80 | 200 | |
| Wallman | city | Maryland | United States | 39.32 | -79.28 | 2509 | |
| Wallville | city | Maryland | United States | 38.42 | -76.51 | 72 | |
| Wallville Acres | city | Maryland | United States | 38.45 | -76.53 | 104 | |
| Walnut | city | Maryland | United States | 38.32 | -75.66 | 29 | |
| Walnut Cove | city | Maryland | United States | 38.44 | -76.48 | 49 | |
| Walnut Grove | city | Maryland | United States | 39.70 | -77.17 | 830 | |
| Walnut Grove Mills | city | Maryland | United States | 39.51 | -76.93 | 830 | |
| Walnut Hill | city | Maryland | United States | 39.54 | -77.12 | 830 | |
| Walnut Hill | city | Maryland | United States | 39.13 | -77.18 | 830 | |
| Walnut Hills | city | Maryland | United States | 38.51 | -76.77 | 147 | |
| Walnut Hills Estates | city | Maryland | United States | 39.45 | -76.40 | 200 | |
| Walnut Lake | city | Maryland | United States | 38.93 | -76.48 | 9 | |
| Walnut Landing | city | Maryland | United States | 38.42 | -76.25 | 3 | |
| Walnut Landing | city | Maryland | United States | 38.53 | -75.77 | 3 | |
| Walnut Ridge | city | Maryland | United States | 39.55 | -76.97 | 830 | |
| Walnut Ridge | city | Maryland | United States | 39.03 | -76.44 | 9 | |
| Walnut Shores | city | Maryland | United States | 38.94 | -76.28 | 0 | |
| Walnut Springs | city | Maryland | United States | 39.66 | -76.58 | 830 | |
| Walnut Woods | city | Maryland | United States | 39.05 | -77.15 | 301 | |
| Walston | city | Maryland | United States | 38.39 | -75.50 | 49 | |
| Walston Switch | city | Maryland | United States | 38.39 | -75.50 | 62 | |
| Waltherson | city | Maryland | United States | 39.35 | -76.56 | 249 | |
| Wampler Village | city | Maryland | United States | 39.34 | -76.44 | 39 | |
| Wango | city | Maryland | United States | 38.32 | -75.45 | 45 | |
| Warburton Manor | city | Maryland | United States | 38.72 | -76.99 | 196 | |
| Warburton Oaks | city | Maryland | United States | 38.74 | -77.00 | 45 | |
| Ward | city | Maryland | United States | 37.99 | -75.84 | 3 | |
| Ward | city | Maryland | United States | 38.01 | -75.81 | 3 | |
| Ward Farm Estates | city | Maryland | United States | 39.23 | -77.18 | 830 | |
| Wardens Landing | city | Maryland | United States | 39.22 | -76.82 | 396 | |
| Wardour | city | Maryland | United States | 38.99 | -76.50 | 6 | |
| Wardour Bluffs | city | Maryland | United States | 39.00 | -76.49 | 3 | |
| Wards Meadow | city | Maryland | United States | 38.70 | -76.65 | 98 | |
| Warfield | city | Maryland | United States | 39.12 | -76.71 | 104 | |
| Warfield | city | Maryland | United States | 39.45 | -77.44 | 354 | |
| Warfield Estates | city | Maryland | United States | 39.28 | -77.02 | 830 | |
| Warfields Range | city | Maryland | United States | 39.15 | -76.87 | 360 | |
| Warfieldsburg | city | Maryland | United States | 39.53 | -77.03 | 830 | |
| Waring (historical) | city | Maryland | United States | 39.16 | -77.25 | 357 | |
| Warington Hills | city | Maryland | United States | 38.60 | -77.16 | 3 | |
| Warren | city | Maryland | United States | 39.48 | -76.62 | 830 | |
| Warrens Park | city | Maryland | United States | 38.38 | -75.07 | 3 | |
| Warrington (historical) | city | Maryland | United States | 38.54 | -76.54 | 95 | |
| Warrlinda | city | Maryland | United States | 38.57 | -76.98 | 200 | |
| Warthen Knolls | city | Maryland | United States | 38.87 | -76.60 | 147 | |
| Warwick | city | Maryland | United States | 39.42 | -75.78 | 49 | |
| Warwick | city | Maryland | United States | 39.55 | -76.35 | 344 | |
| Warwick | city | Maryland | United States | 39.52 | -76.19 | 167 | |
| Washington Court | city | Maryland | United States | 39.54 | -76.99 | 830 | |
| Washington Crest Heights | city | Maryland | United States | 39.15 | -76.68 | 111 | |
| Washington Four | city | Maryland | United States | 39.51 | -77.81 | 830 | |
| Washington Grove | city | Maryland | United States | 39.14 | -77.18 | 830 | |
| Washington Heights | city | Maryland | United States | 38.37 | -75.57 | 29 | |
| Washington Heights | city | Maryland | United States | 39.57 | -76.99 | 843 | |
| Washington Junction | city | Maryland | United States | 39.27 | -77.53 | 249 | |
| Washington Manor | city | Maryland | United States | 39.17 | -76.79 | 200 | |
| Washington Manor Park | city | Maryland | United States | 39.18 | -76.77 | 160 | |
| Washington Park | city | Maryland | United States | 39.22 | -76.09 | 49 | |
| Washington Woods | city | Maryland | United States | 39.62 | -75.80 | 196 | |
| Washingtonian Woods | city | Maryland | United States | 39.11 | -77.22 | 393 | |
| Water Acres | city | Maryland | United States | 39.37 | -77.74 | 413 | |
| Water Oak Cove | city | Maryland | United States | 39.15 | -76.51 | 22 | |
| Water Oak Forest | city | Maryland | United States | 39.14 | -76.51 | 59 | |
| Water Oak Point | city | Maryland | United States | 39.15 | -76.51 | 22 | |
| Water View | city | Maryland | United States | 39.23 | -76.45 | 3 | |
| Water View | city | Maryland | United States | 39.36 | -77.27 | 830 | |
| Waterbury | city | Maryland | United States | 39.05 | -76.63 | 150 | |
| Waterbury Heights | city | Maryland | United States | 39.06 | -76.61 | 147 | |
| Waterford | city | Maryland | United States | 39.20 | -76.97 | 830 | |
| Waterford | city | Maryland | United States | 39.42 | -77.43 | 301 | |
| Waterford Place | city | Maryland | United States | 39.32 | -76.76 | 400 | |
| Watergate | city | Maryland | United States | 38.92 | -76.47 | 3 | |
| Watergate Village | city | Maryland | United States | 38.96 | -76.48 | 3 | |
| Waterloo | city | Maryland | United States | 39.17 | -76.78 | 200 | |
| Waterloo | city | Maryland | United States | 38.23 | -76.78 | 3 | |
| Waterloo | city | Maryland | United States | 39.56 | -77.57 | 1000 | |
| Waters Edge | city | Maryland | United States | 39.40 | -76.97 | 830 | |
| Watersman | city | Maryland | United States | 38.96 | -76.22 | 3 | |
| Waterspout | city | Maryland | United States | 39.47 | -76.74 | 830 | |
| Watersville | city | Maryland | United States | 39.37 | -77.10 | 830 | |
| Watersville Acres | city | Maryland | United States | 39.38 | -77.11 | 830 | |
| Watervale | city | Maryland | United States | 39.53 | -76.37 | 249 | |
| Waterview | city | Maryland | United States | 38.25 | -75.90 | 6 | |
| Watkins Mill | city | Maryland | United States | 39.18 | -77.21 | 351 | |
| Watkins Overlook | city | Maryland | United States | 39.24 | -77.23 | 830 | |
| Watkins Wilderness | city | Maryland | United States | 39.32 | -77.25 | 830 | |
| Watson Estates | city | Maryland | United States | 38.55 | -76.58 | 101 | |
| Watson Place | city | Maryland | United States | 39.12 | -76.62 | 147 | |
| Waverly | city | Maryland | United States | 38.76 | -76.11 | 3 | |
| Waverly | city | Maryland | United States | 39.33 | -76.61 | 147 | |
| Waverly Island Estates | city | Maryland | United States | 38.75 | -76.11 | 3 | |
| Waverly Point | city | Maryland | United States | 38.34 | -76.96 | 3 | |
| Waverly Woods | city | Maryland | United States | 39.31 | -76.87 | 830 | |
| Waycroft | city | Maryland | United States | 38.32 | -75.56 | 39 | |
| Wayne | city | Maryland | United States | 39.41 | -77.33 | 830 | |
| Waynes Way | city | Maryland | United States | 39.38 | -77.58 | 354 | |
| Wayside Estates | city | Maryland | United States | 39.27 | -76.96 | 830 | |
| Waysons Corner | city | Maryland | United States | 38.81 | -76.70 | 49 | |
| Waysons Mobile Court | city | Maryland | United States | 38.81 | -76.70 | 49 |