Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Williamsburg Post Office | Post Office | 12 | Dorchester | 38 39 27 N | 075 49 44 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 United Methodist Church | Church | 14 | Talbot | 38 43 17 N | 076 04 14 W |
| Williamsburg Village | Populated Place | 141 | Montgomery | 39 08 45 N | 077 04 37 W |
| Williamson Branch | Stream | | Anne Arundel | 38 53 08 N | 076 33 44 W |
| Williamsport | Populated Place | 124 | Washington | 39 36 02 N | 077 49 14 W |
| Williamsport Church | Church | 123 | Washington | 39 33 09 N | 077 50 28 W |
| Williamsport Church of God | Church | 132 | Washington | 39 35 41 N | 077 49 10 W |
| Williamsport City Hall | Building | 128 | Washington | 39 35 58 N | 077 49 17 W |
| Williamsport Elementary School | School | 142 | Washington | 39 35 59 N | 077 48 33 W |
| Williamsport High School | School | 140 | Washington | 39 35 47 N | 077 48 37 W |
| Williamsport Memorial Library | Building | 128 | Washington | 39 36 03 N | 077 48 57 W |
| Williamsport Post Office | Post Office | 122 | Washington | 39 35 55 N | 077 49 21 W |
| Williamsport Power Plant Dam | Dam | 97 | Washington | 39 35 42 N | 077 49 47 W |
| Williamsport Sanitarium | Hospital | 133 | Washington | 39 36 12 N | 077 49 07 W |
| Williamsport Station | Locale | 140 | Washington | 39 34 58 N | 077 48 50 W |
| Williamsport Station | Locale | 119 | Washington | 39 36 25 N | 077 49 28 W |
| Williamsport United Methodist Church | Church | 131 | Washington | 39 35 53 N | 077 49 14 W |
| Williar | Populated Place | 127 | Frederick | 39 30 30 N | 077 24 24 W |
| Willie Breeze | Populated Place | 44 | Calvert | 38 37 35 N | 076 32 07 W |
| Willim S Schmidt Enviromental Education Center | School | 58 | Prince George's | 38 37 22 N | 076 44 26 W |
| Willings Creek | Stream | | Dorchester | 38 27 07 N | 076 15 48 W |
| Willis Acres | Populated Place | 134 | Frederick | 39 30 09 N | 077 26 04 W |
| Willis Creek | Stream | 183 | Garrett | 39 38 50 N | 078 45 52 W |
| Willis Pumping Station | Locale | 66 | Prince George's | 39 06 57 N | 076 52 30 W |
| Willis School (historical) | School | 107 | Prince George's | 39 05 59 N | 076 53 23 W |
| Williston | Populated Place | 8 | Caroline | 38 49 52 N | 075 51 04 W |
| Williston Church | Church | 8 | Caroline | 38 49 52 N | 075 51 04 W |
| Williston Lake | Lake | 8 | Caroline | 38 49 50 N | 075 50 47 W |
| Williston Mill (historical) | Locale | 6 | Caroline | 38 49 44 N | 075 50 48 W |
| Williston Mill Dam | Dam | 8 | Caroline | 38 49 50 N | 075 50 47 W |
| Willmer Creek | Stream | | Charles | 38 25 08 N | 076 56 25 W |
| Willobrook Shopping Center | Locale | 97 | Baltimore (city) | 39 18 38 N | 076 40 32 W |
| Willoughby | Populated Place | 20 | Queen Anne's | 38 56 03 N | 076 01 06 W |
| Willoughby Court | Populated Place | 10 | Harford | 39 25 31 N | 076 17 22 W |
| Willoughby School (historical) | School | 18 | Caroline | 38 51 28 N | 075 44 48 W |
| Willoughby Woods | Populated Place | 8 | Harford | 39 25 45 N | 076 16 04 W |
| Willow | Populated Place | 29 | Anne Arundel | 39 12 04 N | 076 37 01 W |
| Willow Beach Colony | Populated Place | 28 | Calvert | 38 37 43 N | 076 31 03 W |
| Willow Brook | Stream | | Allegany | 39 40 15 N | 078 47 14 W |
| Willow Brook Estates | Populated Place | 26 | St. Mary's | 38 12 34 N | 076 29 25 W |
| Willow Brook Seventh Day Adventist Church | Church | 155 | Washington | 39 33 31 N | 077 38 53 W |
| Willow Gate (subdivision) | Populated Place | 61 | Charles | 38 32 34 N | 076 58 44 W |
| Willow Glen | Locale | 3 | St. Mary's | 38 19 20 N | 076 49 29 W |
| Willow Glen | Populated Place | 133 | Baltimore | 39 21 20 N | 076 44 03 W |
| Willow Glen North Park | Park | 145 | Baltimore | 39 22 20 N | 076 45 14 W |
| Willow Grove | Populated Place | 2 | Worcester | 38 05 33 N | 075 30 10 W |
| Willow Grove Creek | Stream | | Worcester | 38 06 28 N | 075 30 45 W |
| Willow Grove Park | Park | 13 | Baltimore | 39 14 43 N | 076 40 02 W |
| Willow Ridge | Populated Place | 131 | Montgomery | 39 07 13 N | 077 15 39 W |
| Willow Rill | Stream | | Frederick | 39 42 01 N | 077 19 09 W |
| Willow Run | Stream | | Anne Arundel | 38 52 05 N | 076 33 23 W |
| Willowbrook | Populated Place | 16 | Anne Arundel | 39 07 08 N | 076 32 34 W |
| Willowbrook Hills | Populated Place | 23 | Calvert | 38 33 37 N | 076 34 16 W |
| Willowcrest (subdivision) | Populated Place | 109 | Frederick | 39 25 40 N | 077 27 06 W |
| Willowcrest Gardens (subdivision) | Populated Place | 111 | Frederick | 39 25 17 N | 077 27 01 W |
| Willowdale | Populated Place | 18 | Anne Arundel | 39 09 53 N | 076 38 04 W |
| Willowdale Farms | Locale | 125 | Frederick | 39 41 59 N | 077 15 44 W |
| Willowdale Park | Park | 102 | Frederick | 39 25 24 N | 077 26 56 W |
| Willows | Populated Place | 43 | Calvert | 38 37 39 N | 076 32 16 W |
| Willows | Populated Place | 170 | Harford | 39 32 18 N | 076 26 09 W |
| Willowstone | Populated Place | 14 | Cecil | 39 32 18 N | 075 51 34 W |
| Willowtree Plaza Shopping Center | Locale | 110 | Frederick | 39 25 12 N | 077 27 07 W |
| Wills Branch | Stream | | Charles | 38 28 54 N | 077 01 28 W |
| Wills Creek | Stream | | Allegany | 39 38 56 N | 078 45 53 W |
| Wills Island (historical) | Island | -10 | Charles | 38 28 59 N | 077 01 34 W |
| Wills Memorial Park | Park | 56 | Charles | 38 31 10 N | 076 58 45 W |
| Wills Mountain State Park | Park | 244 | Allegany | 39 40 07 N | 078 46 54 W |
| Willson Hills | Populated Place | 110 | Montgomery | 39 05 43 N | 077 02 28 W |
| Willwood | Populated Place | 209 | Harford | 39 41 55 N | 076 29 02 W |
| Wilmar Farms | Locale | 241 | Frederick | 39 27 32 N | 077 31 10 W |
| Wilmer Neck | Cape | 11 | Queen Anne's | 39 08 07 N | 076 03 28 W |
| Wilmer Park | Park | 5 | Kent | 39 12 16 N | 076 03 57 W |
| Wilmer Point | Cape | 6 | Kent | 39 09 27 N | 076 02 60 W |
| Wilmers | Populated Place | 6 | Queen Anne's | 39 09 18 N | 076 02 56 W |
| Wilmington Park Christian Church | Church | 38 | Baltimore (city) | 39 16 19 N | 076 39 50 W |
| Wilna | Populated Place | 105 | Harford | 39 29 00 N | 076 22 26 W |
| Wilshire (subdivision) | Populated Place | 11 | Anne Arundel | 38 57 18 N | 076 28 50 W |
| Wilson | Populated Place | 23 | Calvert | 38 36 11 N | 076 31 19 W |
| Wilson | Populated Place | 760 | Garrett | 39 15 13 N | 079 23 56 W |
| Wilson | Populated Place | 777 | Garrett | 39 25 56 N | 079 16 13 W |
| Wilson | Populated Place | 117 | Washington | 39 39 29 N | 077 50 55 W |
| Wilson (historical) | Populated Place | 36 | Calvert | 38 44 15 N | 076 37 34 W |
| Wilson Avenue Station (historical) | Locale | 93 | Frederick | 39 25 36 N | 077 25 51 W |
| Wilson Bridge | Bridge | 108 | Washington | 39 39 28 N | 077 50 53 W |
| Wilson Church | Church | 153 | Baltimore | 39 28 19 N | 076 31 19 W |
| Wilson Church | Church | 7 | Worcester | 38 26 42 N | 075 11 32 W |
| Wilson Commercial Industrial Complex | Locale | | Anne Arundel | 39 10 30 N | 076 37 32 W |
| Wilson Memorial United Methodist Church | Church | 34 | Anne Arundel | 39 01 25 N | 076 41 29 W |
| Wilson Mill | Populated Place | 26 | Harford | 39 37 00 N | 076 12 07 W |
| Wilson Owens Branch | Stream | | Anne Arundel | 38 49 33 N | 076 41 48 W |
| Wilson Point | Cape | -4 | Baltimore | 39 18 35 N | 076 24 34 W |
| Wilson Point | Cape | 3 | Cecil | 39 21 59 N | 075 50 57 W |
| Wilson Point | Cape | 0 | Harford | 39 22 36 N | 076 16 20 W |
| Wilson Point | Cape | 0 | Kent | 39 03 11 N | 076 13 37 W |
| Wilson Point | Populated Place | 5 | Baltimore | 39 18 57 N | 076 25 04 W |
| Wilson Point Wharf (historical) | Locale | 2 | Kent | 39 21 58 N | 075 50 59 W |
| Wilson Pond | Lake | 0 | Kent | 39 03 46 N | 076 13 41 W |
| Wilson Quarry | Mine | 131 | Washington | 39 39 17 N | 077 51 07 W |
| Wilson Run | Stream | | Garrett | 39 24 32 N | 079 24 32 W |
| Wilson School | School | 792 | Garrett | 39 25 53 N | 079 16 29 W |
| Wilson Terrace | Populated Place | 196 | Carroll | 39 26 09 N | 076 59 28 W |
| Wilsons Choice | Populated Place | 193 | Harford | 39 42 08 N | 076 29 52 W |
| Wilsons Fishery | Locale | 0 | Cecil | 39 29 08 N | 075 57 29 W |
| Wilsons Wharf | Locale | 2 | Anne Arundel | 39 03 54 N | 076 29 28 W |
| Wilton Farm Acres | Populated Place | 144 | Howard | 39 18 00 N | 076 49 14 W |
| Wilton Heights Methodist Protestant Church | Church | 134 | Baltimore (city) | 39 20 53 N | 076 40 52 W |
| Wiltondale | Populated Place | 129 | Baltimore | 39 23 11 N | 076 36 04 W |
| Wilwon Woods | Populated Place | 57 | Cecil | 39 33 10 N | 075 55 22 W |