Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Washington Grove Post Office | Post Office | 158 | Montgomery | 39 08 20 N | 077 10 47 W |
| Washington Grove Railroad Station | Building | 160 | Montgomery | 39 08 08 N | 077 10 26 W |
| Washington Grove Town Hall | Building | 154 | Montgomery | 39 08 25 N | 077 10 33 W |
| Washington Hebrew Congreational Julia Bindman Center | Church | 122 | Montgomery | 39 03 00 N | 077 11 24 W |
| Washington Heights | Populated Place | 11 | Wicomico | 38 22 20 N | 075 34 24 W |
| Washington Heights (subdivision) | Populated Place | 241 | Carroll | 39 34 03 N | 076 59 30 W |
| Washington High School | School | 4 | Somerset | 38 12 31 N | 075 41 43 W |
| Washington Junction | Populated Place | 70 | Frederick | 39 16 21 N | 077 31 54 W |
| Washington Manor | Populated Place | 80 | Howard | 39 10 11 N | 076 47 42 W |
| Washington Manor Park | Populated Place | 60 | Howard | 39 10 58 N | 076 46 01 W |
| Washington Memorial Christian Church | Church | 44 | Prince George's | 38 44 34 N | 076 59 26 W |
| Washington Methodist Church | Church | 13 | Dorchester | 38 38 04 N | 075 51 54 W |
| Washington Monument | Park | 25 | Baltimore (city) | 39 17 51 N | 076 36 56 W |
| Washington Monument State Park | Park | 424 | Washington | 39 29 54 N | 077 37 32 W |
| Washington Mormon Temple | Church | 90 | Montgomery | 39 00 50 N | 077 03 56 W |
| Washington National Cemetery | Cemetery | 84 | Prince George's | 38 51 16 N | 076 56 33 W |
| Washington National Pike Industrial Park | Locale | 127 | Montgomery | 39 05 40 N | 077 10 47 W |
| Washington Park | Populated Place | 19 | Kent | 39 13 29 N | 076 05 08 W |
| Washington Run | Stream | | Frederick | 39 16 15 N | 077 31 56 W |
| Washington School | School | 185 | Washington | 39 38 53 N | 077 44 15 W |
| Washington School (historical) | School | 159 | Carroll | 39 41 46 N | 077 08 28 W |
| Washington School (historical) | School | 127 | Frederick | 39 37 59 N | 077 21 12 W |
| Washington School House (historical) | School | 110 | Cecil | 39 39 15 N | 075 59 14 W |
| Washington Science Center | Locale | 110 | Montgomery | 39 03 04 N | 077 07 32 W |
| Washington Shopping Center | Locale | 196 | Washington | 39 41 05 N | 077 43 10 W |
| Washington Square Park | Park | 163 | Montgomery | 39 08 43 N | 077 10 14 W |
| Washington Square United Methodist Church | Church | 183 | Washington | 39 38 47 N | 077 43 46 W |
| Washington Street Historic District | Park | 197 | Allegany | 39 39 05 N | 078 46 12 W |
| Washington Village Branch Enoch Pratt Free Library | Building | 13 | Baltimore (city) | 39 16 59 N | 076 37 51 W |
| Washington Waldorf School | School | 86 | Montgomery | 38 57 08 N | 077 07 18 W |
| Washington Woods (subdivision) | Populated Place | 65 | Cecil | 39 36 54 N | 075 48 05 W |
| Waste Gate | Locale | 15 | Wicomico | 38 20 34 N | 075 28 12 W |
| Waste Gate Creek | Stream | | Wicomico | 38 20 12 N | 075 27 23 W |
| Watch Goose Farm | Locale | 3 | Talbot | 38 45 22 N | 076 12 39 W |
| Water Acres | Populated Place | 112 | Washington | 39 22 25 N | 077 44 39 W |
| Water Oak Cove | Populated Place | 6 | Anne Arundel | 39 08 48 N | 076 30 44 W |
| Water Oak Forest | Populated Place | 10 | Anne Arundel | 39 08 38 N | 076 30 33 W |
| Water Oak Point | Cape | 0 | Anne Arundel | 39 09 03 N | 076 30 32 W |
| Water Oak Point | Populated Place | 2 | Anne Arundel | 39 09 02 N | 076 30 38 W |
| Water United Methodist Church | Church | 0 | Talbot | 38 41 22 N | 076 10 18 W |
| Water View | Populated Place | 4 | Baltimore | 39 13 50 N | 076 27 05 W |
| Water View | Populated Place | 160 | Frederick | 39 21 33 N | 077 16 05 W |
| Water Witch Fire Company | Building | | Cecil | 40 00 53 N | 076 11 59 W |
| Waterbury | Populated Place | 30 | Anne Arundel | 39 02 51 N | 076 37 36 W |
| Waterbury Church | Church | 57 | Anne Arundel | 39 04 42 N | 076 41 00 W |
| Waterbury Heights | Populated Place | 28 | Anne Arundel | 39 03 19 N | 076 36 46 W |
| Waterbury Recreation Area | Park | 35 | Anne Arundel | 39 03 26 N | 076 36 40 W |
| Waterbury School (historical) | School | 20 | Anne Arundel | 39 03 24 N | 076 37 24 W |
| Wateredge Church | Church | 3 | Baltimore | 39 14 45 N | 076 30 29 W |
| Waterford | Populated Place | 168 | Howard | 39 12 12 N | 076 58 22 W |
| Waterford (subdivision) | Populated Place | 97 | Frederick | 39 25 16 N | 077 26 05 W |
| Waterford Park | Park | 92 | Frederick | 39 25 26 N | 077 25 54 W |
| Waterford Place | Populated Place | 144 | Baltimore | 39 19 26 N | 076 45 28 W |
| Watergate | Populated Place | 3 | Anne Arundel | 38 54 55 N | 076 28 29 W |
| Watergate Village (subdivision) | Populated Place | 7 | Anne Arundel | 38 57 50 N | 076 29 04 W |
| Waterhole Cove | Bay | 12 | Talbot | 38 45 53 N | 076 18 57 W |
| Waterloo | Populated Place | 285 | Frederick | 39 33 28 N | 077 34 07 W |
| Waterloo | Populated Place | 69 | Howard | 39 10 19 N | 076 47 06 W |
| Waterloo | Populated Place | 3 | St. Mary's | 38 13 52 N | 076 46 45 W |
| Waterloo Elementary School | School | 121 | Howard | 39 12 27 N | 076 47 52 W |
| Waterloo Junior High School | School | 86 | Howard | 39 11 05 N | 076 47 11 W |
| Waterloo Park | Park | 78 | Howard | 39 11 00 N | 076 47 05 W |
| Waterloo Point | Cape | 3 | St. Mary's | 38 13 51 N | 076 46 44 W |
| Waterloo Point Bar | Bar | -3 | St. Mary's | 38 13 37 N | 076 46 43 W |
| Watermans Business Park | Locale | 2 | Queen Anne's | 38 58 25 N | 076 16 19 W |
| Watermelon Point | Cape | 2 | Talbot | 38 45 17 N | 076 06 36 W |
| Watermelon Point | Cape | 0 | Worcester | 38 06 51 N | 075 17 31 W |
| Waters Avenue African Methodist Episcopal Church | Church | 10 | Baltimore (city) | 39 17 43 N | 076 36 06 W |
| Waters Branch | Stream | | Anne Arundel | 38 54 14 N | 076 32 46 W |
| Waters Cemetery | Cemetery | 42 | Calvert | 38 27 35 N | 076 32 29 W |
| Waters Church | Church | 42 | Calvert | 38 27 34 N | 076 32 29 W |
| Waters Church | Church | 2 | Dorchester | 38 29 17 N | 075 58 09 W |
| Waters Edge | Populated Place | 184 | Carroll | 39 23 52 N | 076 58 24 W |
| Waters Landing Elementary School | School | 145 | Montgomery | 39 11 19 N | 077 16 09 W |
| Waters Run | Stream | | Garrett | 39 32 08 N | 079 11 19 W |
| Watersman | Populated Place | 5 | Queen Anne's | 38 57 35 N | 076 12 59 W |
| Waterspout | Populated Place | 208 | Baltimore | 39 28 08 N | 076 44 42 W |
| Waterspout Run | Stream | | Baltimore | 39 30 11 N | 076 45 27 W |
| Watersville | Populated Place | 194 | Howard | 39 22 03 N | 077 06 13 W |
| Watersville Acres | Populated Place | 207 | Carroll | 39 22 38 N | 077 06 21 W |
| Watervale | Populated Place | 91 | Harford | 39 31 42 N | 076 22 22 W |
| Waterview | Populated Place | 2 | Wicomico | 38 14 49 N | 075 54 11 W |
| Waterwitch Fire Station Number 1 | Building | 5 | Anne Arundel | 38 58 44 N | 076 29 12 W |
| Waterworks Creek | Stream | | Worcester | 38 12 15 N | 075 15 41 W |
| Watkins Island | Island | 51 | Montgomery | 39 02 32 N | 077 16 44 W |
| Watkins Mill | Populated Place | 133 | Montgomery | 39 10 55 N | 077 12 49 W |
| Watkins Mill Elementary School | School | 111 | Montgomery | 39 10 01 N | 077 12 39 W |
| Watkins Mill High School | School | 139 | Montgomery | 39 11 01 N | 077 12 54 W |
| Watkins Overlook | Populated Place | 181 | Montgomery | 39 14 13 N | 077 13 39 W |
| Watkins Park | Park | 222 | Carroll | 39 22 32 N | 077 08 45 W |
| Watkins Point | Cape | 0 | Somerset | 37 54 45 N | 075 52 55 W |
| Watkins Pointe (historical) | Cape | -3 | Somerset | 37 58 17 N | 075 53 59 W |
| Watkins Wilderness | Populated Place | 176 | Frederick | 39 19 11 N | 077 15 10 W |
| Watson Creek | Stream | | Harford | 39 20 54 N | 076 17 39 W |
| Watson Estates | Populated Place | 37 | Calvert | 38 32 58 N | 076 34 53 W |
| Watson Place | Populated Place | 32 | Anne Arundel | 39 06 59 N | 076 37 11 W |
| Watt Cemetery (historical) | Cemetery | 57 | Anne Arundel | 39 06 43 N | 076 43 25 W |
| Watters Cemetery | Cemetery | 169 | Harford | 39 36 04 N | 076 26 26 W |
| Watters Church | Church | 173 | Harford | 39 36 06 N | 076 26 28 W |
| Watts Branch | Stream | | Montgomery | 39 02 23 N | 077 15 36 W |
| Watts Branch | Stream | | Prince George's | 38 54 21 N | 076 57 26 W |
| Watts Creek | Stream | | Caroline | 38 51 29 N | 075 50 33 W |
| Watts Farm Pond Dam | Dam | 18 | Kent | 39 17 24 N | 076 06 41 W |
| Watty Point | Cape | 0 | Cecil | 39 31 45 N | 075 51 18 W |
| Waugh Cemetery | Cemetery | 57 | Anne Arundel | 39 03 06 N | 076 41 46 W |
| Waugh Cemetery | Cemetery | 5 | Dorchester | 38 33 57 N | 076 04 59 W |
| Waugh Chapel (historical) | Church | 59 | Anne Arundel | 39 03 07 N | 076 41 45 W |
| Waugh Chapel Elementary School | School | 69 | Anne Arundel | 39 03 53 N | 076 41 46 W |
| Waugh Chapel Fire Station 5 | Building | | Anne Arundel | 39 02 19 N | 076 40 30 W |
| Waugh Church | Church | 111 | Baltimore | 39 26 17 N | 076 29 24 W |