Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Wildcat Branch | Stream | | Montgomery | 39 12 58 N | 077 12 36 W |
| Wildcat Forest | Populated Place | 159 | Montgomery | 39 13 30 N | 077 12 12 W |
| Wilderness Walk | Populated Place | 170 | Montgomery | 39 14 17 N | 077 12 21 W |
| Wildwood Baptist Church | Church | 118 | Montgomery | 39 01 21 N | 077 07 28 W |
| Wildwood Hills | Populated Place | 87 | Montgomery | 39 01 09 N | 077 08 59 W |
| Wildwood Manor | Populated Place | 99 | Montgomery | 39 01 25 N | 077 07 06 W |
| Wildwood Medical Center | Hospital | 116 | Montgomery | 39 01 35 N | 077 07 31 W |
| Wildwood Shopping Center | Locale | 114 | Montgomery | 39 01 27 N | 077 07 25 W |
| Willerburn Acres | Populated Place | 102 | Montgomery | 39 03 05 N | 077 09 36 W |
| Willett Branch | Stream | | Montgomery | 38 57 33 N | 077 06 17 W |
| Willett Estates | Populated Place | 159 | Montgomery | 39 13 29 N | 077 07 14 W |
| William H Farquhar Middle School | School | 155 | Montgomery | 39 08 03 N | 077 02 42 W |
| William Tyler Page Elementary School | School | 123 | Montgomery | 39 04 28 N | 076 59 02 W |
| Williamsburg Estates | Populated Place | 106 | Montgomery | 39 00 30 N | 077 12 01 W |
| Williamsburg Run | Stream | | Montgomery | 39 08 23 N | 077 06 12 W |
| Williamsburg Square | Populated Place | 112 | Montgomery | 39 09 21 N | 077 16 09 W |
| Williamsburg Village | Populated Place | 141 | Montgomery | 39 08 45 N | 077 04 37 W |
| Willow Ridge | Populated Place | 131 | Montgomery | 39 07 13 N | 077 15 39 W |
| Willson Hills | Populated Place | 110 | Montgomery | 39 05 43 N | 077 02 28 W |
| Windham (historical) | Populated Place | 94 | Montgomery | 39 02 35 N | 077 05 54 W |
| Windham Manor | Populated Place | 120 | Montgomery | 39 03 42 N | 076 59 47 W |
| Windmill Farm | Populated Place | 101 | Montgomery | 39 04 55 N | 077 15 38 W |
| Winnemanna Lodge | Locale | 20 | Montgomery | 38 58 13 N | 077 10 39 W |
| Winston Churchill High School | School | 119 | Montgomery | 39 02 38 N | 077 10 21 W |
| Wintergreen Plaza Shopping Center | Locale | 127 | Montgomery | 39 04 28 N | 077 08 19 W |
| WINX Radio Station | Tower | 132 | Montgomery | 39 04 54 N | 077 08 41 W |
| WINX-AM (Rockville) | Tower | 139 | Montgomery | 39 05 51 N | 077 09 06 W |
| WLTT-FM (Bethesda) | Tower | 73 | Montgomery | 38 57 49 N | 077 06 17 W |
| WMDO-AM (Wheaton) | Tower | 93 | Montgomery | 39 00 50 N | 077 01 45 W |
| WMET-AM (Gaithersburg) | Tower | 101 | Montgomery | 39 11 16 N | 077 12 55 W |
| WNTR-AM (Silver Spring) | Tower | 93 | Montgomery | 39 00 50 N | 077 01 45 W |
| Wolf Acres | Populated Place | 129 | Montgomery | 39 04 15 N | 077 00 30 W |
| Wood Acres | Populated Place | 95 | Montgomery | 38 58 05 N | 077 07 25 W |
| Woodacres Elementary School | School | 108 | Montgomery | 38 58 03 N | 077 07 07 W |
| Woodburn | Populated Place | 86 | Montgomery | 38 58 24 N | 077 07 36 W |
| Woodbyran Farms | Populated Place | 115 | Montgomery | 39 05 14 N | 077 18 36 W |
| Woodfield | Populated Place | 184 | Montgomery | 39 14 48 N | 077 11 26 W |
| Woodfield Elementary School | School | 185 | Montgomery | 39 15 10 N | 077 11 53 W |
| Woodhaven | Populated Place | 85 | Montgomery | 38 59 37 N | 077 08 00 W |
| Woodlawn Park | Park | 130 | Montgomery | 39 07 45 N | 077 01 29 W |
| Woodley Gardens | Populated Place | 132 | Montgomery | 39 05 54 N | 077 10 22 W |
| Woodley Gardens Elementary School (historical) | School | 138 | Montgomery | 39 06 02 N | 077 10 37 W |
| Woodley Gardens Park | Park | 111 | Montgomery | 39 05 45 N | 077 10 09 W |
| Woodley Gardens Park Shopping Center | Locale | 117 | Montgomery | 39 05 30 N | 077 10 29 W |
| Woodlin Elementary School | School | 104 | Montgomery | 39 00 22 N | 077 02 49 W |
| Woodmont | Populated Place | 103 | Montgomery | 38 59 23 N | 077 05 55 W |
| Woodmont Country Club | Locale | 122 | Montgomery | 39 03 53 N | 077 08 25 W |
| Woodmont Country Club (historical) | Locale | 98 | Montgomery | 38 59 43 N | 077 05 54 W |
| Woodmont Station Shopping Center | Locale | 117 | Montgomery | 39 04 02 N | 077 07 47 W |
| Woodmoor | Populated Place | 90 | Montgomery | 39 01 26 N | 077 00 40 W |
| Woodmoor Post Office | Post Office | 104 | Montgomery | 39 01 13 N | 077 00 53 W |
| Woodside | Populated Place | 116 | Montgomery | 39 00 12 N | 077 02 16 W |
| Woodside Forest | Populated Place | 106 | Montgomery | 39 00 32 N | 077 02 05 W |
| Woodside Park | Populated Place | 99 | Montgomery | 39 00 23 N | 077 01 49 W |
| Woodside School | School | 106 | Montgomery | 38 59 59 N | 077 01 59 W |
| Woodside Synagogue | Church | 112 | Montgomery | 39 00 10 N | 077 02 06 W |
| Woodside United Methodist Church | Church | 106 | Montgomery | 39 00 03 N | 077 02 02 W |
| Woodward Park | Park | 156 | Montgomery | 39 08 28 N | 077 10 19 W |
| Wootten Mill Park | Park | 98 | Montgomery | 39 04 55 N | 077 10 45 W |
| WSSC Filtration Plant | Locale | 79 | Montgomery | 39 02 24 N | 077 15 15 W |
| WSSC Pumping Station | Locale | 129 | Montgomery | 39 10 44 N | 077 17 11 W |
| Wyngate | Populated Place | 98 | Montgomery | 39 00 38 N | 077 07 20 W |
| Wyngate Elementary School | School | 97 | Montgomery | 39 00 35 N | 077 07 41 W |
| Wyngate Woods Park | Park | 105 | Montgomery | 39 00 38 N | 077 07 48 W |
| Yellow Falls | Falls | 17 | Montgomery | 38 58 14 N | 077 12 36 W |
| YMCA | Building | 126 | Montgomery | 39 10 14 N | 077 12 24 W |
| YMCA Silver Spring Community Branch Park | Park | 124 | Montgomery | 39 05 30 N | 077 03 23 W |
| Young Israel Shomrai Emunah Synagogue | Church | 118 | Montgomery | 39 02 24 N | 077 01 44 W |
| Young Israel Shomrai Emunah Synagogue | Church | 112 | Montgomery | 39 01 55 N | 077 01 20 W |
| Zion Church | Church | 133 | Montgomery | 39 05 44 N | 077 08 54 W |
| Abiding Presence Lutheran Church | Church | 72 | Prince George's | 39 02 34 N | 076 55 29 W |
| Acco Park | Populated Place | 62 | Prince George's | 38 40 26 N | 076 59 60 W |
| Accokeek | Populated Place | 58 | Prince George's | 38 40 03 N | 077 01 42 W |
| Accokeek Acres | Populated Place | 62 | Prince George's | 38 40 07 N | 076 59 36 W |
| Accokeek Branch Library | Building | 59 | Prince George's | 38 40 09 N | 077 01 43 W |
| Accokeek Branch Prince George's County Memorial Library | Building | 58 | Prince George's | 38 40 11 N | 077 01 34 W |
| Accokeek Lawn | Populated Place | 54 | Prince George's | 38 40 10 N | 077 02 19 W |
| Accokeek Neighborhood Park | Park | 58 | Prince George's | 38 40 08 N | 077 01 32 W |
| Accokeek Post Office | Post Office | 58 | Prince George's | 38 39 54 N | 077 01 60 W |
| Accokeek School (historical) | School | 56 | Prince George's | 38 40 07 N | 077 01 36 W |
| Accokeek Volunteer Fire Department Company 24 | Building | | Prince George's | 39 07 04 N | 077 03 06 W |
| Acredale | Populated Place | 32 | Prince George's | 39 00 10 N | 076 56 34 W |
| Addison Chapel | Church | 45 | Prince George's | 38 53 56 N | 076 54 35 W |
| Addison Chapel Cemetery | Cemetery | 44 | Prince George's | 38 53 57 N | 076 54 36 W |
| Addison Road-Seat Pleasant Metro Station | Locale | 49 | Prince George's | 38 53 11 N | 076 53 50 W |
| Addison School | School | 53 | Prince George's | 38 47 30 N | 077 00 11 W |
| Adelphi | Populated Place | 52 | Prince George's | 39 00 11 N | 076 58 19 W |
| Adelphi Bible Church | Church | 42 | Prince George's | 38 59 42 N | 076 58 23 W |
| Adelphi Elementary School | School | 53 | Prince George's | 39 00 02 N | 076 58 27 W |
| Adelphi Mill Recreation Center | Park | 30 | Prince George's | 38 59 34 N | 076 58 19 W |
| Adelphi Park | Populated Place | 22 | Prince George's | 38 59 11 N | 076 58 05 W |
| Adelphi Plaza Shopping Center | Locale | 22 | Prince George's | 38 59 05 N | 076 58 03 W |
| Adelphi Recreation Center | Park | 56 | Prince George's | 39 00 26 N | 076 57 40 W |
| Adelphi School | School | 53 | Prince George's | 39 00 01 N | 076 58 25 W |
| Administrative Offices Prince George's County Memorial Library System | Building | 24 | Prince George's | 38 58 07 N | 076 56 59 W |
| Ager Road School | School | 15 | Prince George's | 38 57 55 N | 076 58 21 W |
| Ager Road United Methodist Church | Church | 16 | Prince George's | 38 58 01 N | 076 58 28 W |
| Alex Haley Residence Hall | Building | | Prince George's | 39 01 10 N | 076 45 25 W |
| Allen Pond | Reservoir | 36 | Prince George's | 38 55 57 N | 076 44 32 W |
| Allen Pond Dam | Dam | 36 | Prince George's | 38 55 57 N | 076 44 32 W |
| Allen Pond Park | Park | 38 | Prince George's | 38 56 05 N | 076 44 11 W |
| Allentown Church | Church | 77 | Prince George's | 38 46 54 N | 076 56 44 W |
| Allentown Outlet Mall Shopping Center | Locale | 78 | Prince George's | 38 48 15 N | 076 54 13 W |
| Allentown Road Recreation Center | Park | 82 | Prince George's | 38 47 20 N | 076 55 59 W |
| Allentown Road Volunteer Fire Department Company 32 | Building | | Prince George's | 39 17 35 N | 077 35 29 W |
| Allentown Road Volunteer Fire Department Company 47 | Building | | Prince George's | 39 14 24 N | 077 39 41 W |
| Allentown Way Shopping Center | Locale | 79 | Prince George's | 38 48 06 N | 076 54 25 W |
| Allenwood Elementary School | School | 76 | Prince George's | 38 48 10 N | 076 55 49 W |
| Alter Pond | Reservoir | 33 | Prince George's | 39 00 48 N | 076 51 04 W |
| Amber Meadows Park | Park | 39 | Prince George's | 38 54 41 N | 076 43 07 W |