Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Lothian Post Office | Post Office | 54 | Anne Arundel | 38 49 52 N | 076 36 48 W |
| Lothian School | School | 50 | Anne Arundel | 38 49 37 N | 076 36 47 W |
| Lothian Woods | Populated Place | 29 | Anne Arundel | 38 49 24 N | 076 38 48 W |
| Lottsford Branch | Stream | | Prince George's | 38 55 21 N | 076 49 12 W |
| Lou Mar Estates | Populated Place | 30 | Harford | 39 28 22 N | 076 17 20 W |
| Loudon Park National Cemetery | Cemetery | 55 | Baltimore (city) | 39 16 30 N | 076 40 59 W |
| Loughridge Mill (historical) | Locale | 72 | Washington | 39 19 39 N | 077 40 56 W |
| Louis Heights | Populated Place | 5 | Worcester | 38 25 37 N | 075 09 57 W |
| Louisa M Alcott Elementary School | School | 121 | Baltimore | 39 19 58 N | 076 39 47 W |
| Louisville | Populated Place | 183 | Carroll | 39 26 55 N | 076 55 26 W |
| Lourdes Hall | Building | 82 | Baltimore (city) | 39 22 11 N | 076 39 23 W |
| Lourds Manor | Populated Place | 12 | Anne Arundel | 39 06 33 N | 076 32 37 W |
| Love of Learning Montessori School | School | 133 | Howard | 39 13 55 N | 076 49 12 W |
| Love Point | Cape | 7 | Queen Anne's | 39 02 21 N | 076 18 10 W |
| Love Point | Populated Place | 7 | Queen Anne's | 39 01 55 N | 076 18 41 W |
| Love Point Landing | Locale | 0 | Queen Anne's | 39 01 54 N | 076 18 04 W |
| Love Point Lighthouse | Locale | -5 | Queen Anne's | 39 03 25 N | 076 17 01 W |
| Love Run | Stream | | Cecil | 39 41 25 N | 076 07 37 W |
| Lovejoy Estates | Populated Place | 160 | Frederick | 39 31 08 N | 077 12 07 W |
| Lovel Point | Cape | 1 | Baltimore | 39 14 10 N | 076 30 05 W |
| Lovely Cove | Bay | -2 | Kent | 39 08 52 N | 076 09 14 W |
| Lovely Creek | Bay | 4 | Kent | 39 08 00 N | 076 09 05 W |
| Lovely Lane Museum Library | Building | 37 | Baltimore (city) | 39 18 52 N | 076 36 56 W |
| Lovely Lane United Methodist Church | Church | 37 | Baltimore (city) | 39 18 52 N | 076 36 57 W |
| Lovers Lane (subdivision) | Populated Place | 5 | Dorchester | 38 34 40 N | 076 05 34 W |
| Lovers Leap | Cliff | 363 | Allegany | 39 39 57 N | 078 46 40 W |
| Lovers Point | Cape | -3 | St. Mary's | 38 15 43 N | 076 38 50 W |
| Loves | Populated Place | 41 | Charles | 38 31 28 N | 076 43 41 W |
| Loves Folly | Populated Place | 2 | Talbot | 38 44 51 N | 076 09 51 W |
| Loves Run School (historical) | School | 121 | Cecil | 39 40 14 N | 076 06 53 W |
| Loveton Business Center | Locale | 170 | Baltimore | 39 31 05 N | 076 38 49 W |
| Loveton Farms | Populated Place | 147 | Baltimore | 39 31 07 N | 076 38 24 W |
| Loveville | Populated Place | 45 | St. Mary's | 38 21 43 N | 076 40 59 W |
| Loveville Acres | Populated Place | 45 | St. Mary's | 38 23 23 N | 076 39 41 W |
| Loveville Post Office | Post Office | 40 | St. Mary's | 38 20 58 N | 076 40 41 W |
| Loveville Special Education Center | School | 36 | St. Mary's | 38 19 40 N | 076 40 33 W |
| Lowe House Office Building | Building | | Anne Arundel | 38 58 47 N | 076 29 32 W |
| Lowell Ridge | Populated Place | 139 | Baltimore | 39 24 13 N | 076 32 34 W |
| Lower Bar Neck Point | Cape | 9 | Talbot | 38 40 45 N | 076 19 24 W |
| Lower Brambley (historical) | Populated Place | 5 | St. Mary's | 38 18 03 N | 076 48 39 W |
| Lower Bridge | Bridge | 98 | Washington | 39 27 02 N | 077 43 55 W |
| Lower Cedar Point | Cape | 3 | Charles | 38 20 34 N | 076 58 36 W |
| Lower Five Fathoms Buoy (historical) | Locale | 5 | Queen Anne's | 39 05 06 N | 076 20 28 W |
| Lower Greens Cove | Bay | -3 | Dorchester | 38 20 30 N | 075 54 33 W |
| Lower Hooper Island | Island | 0 | Dorchester | 38 14 23 N | 076 08 19 W |
| Lower Island Point | Cape | -7 | Baltimore | 39 18 13 N | 076 20 25 W |
| Lower Island Point | Cape | 0 | Dorchester | 38 08 50 N | 076 02 16 W |
| Lower Keene Broad | Channel | 0 | Dorchester | 38 23 56 N | 076 15 16 W |
| Lower Lake Royer Dam | Dam | 405 | Washington | 39 42 37 N | 077 29 45 W |
| Lower Magruder Branch Park | Park | 144 | Montgomery | 39 14 26 N | 077 11 48 W |
| Lower Marlboro | Populated Place | 3 | Calvert | 38 39 21 N | 076 40 55 W |
| Lower Marlboro Airport | Airport | 10 | Calvert | 38 39 05 N | 076 40 41 W |
| Lower Marlboro Meadow | Populated Place | 33 | Calvert | 38 39 30 N | 076 37 14 W |
| Lower Marlboro Towne | Populated Place | 8 | Calvert | 38 39 46 N | 076 40 39 W |
| Lower Marlboro United Methodist Church | Church | 7 | Calvert | 38 39 17 N | 076 40 55 W |
| Lower Park Heights Multi-Purpose Center | Building | 122 | Baltimore (city) | 39 20 01 N | 076 39 49 W |
| Lower Sinepuxent Neck | Cape | 1 | Worcester | 38 14 45 N | 075 10 16 W |
| Lower Susquehanna Ferry (historical) | Crossing | 8 | Cecil | 39 33 17 N | 076 04 58 W |
| Lower Swallow Falls | Falls | 662 | Garrett | 39 30 01 N | 079 24 57 W |
| Lower Thorofare | Channel | -3 | Somerset | 38 07 36 N | 075 56 49 W |
| Lower Wroten Point | Cape | 0 | Dorchester | 38 19 02 N | 076 11 37 W |
| Lowery Oaks | Populated Place | 13 | Calvert | 38 34 30 N | 076 38 43 W |
| Lowes Creek | Stream | | Dorchester | 38 20 52 N | 076 09 40 W |
| Lowes Point | Cape | 1 | Talbot | 38 46 30 N | 076 19 59 W |
| Lowes Wharf | Locale | -3 | Talbot | 38 45 55 N | 076 19 43 W |
| Lowndes | Populated Place | 207 | Allegany | 39 32 56 N | 078 51 37 W |
| Lowndes Hall | Building | 613 | Allegany | 39 39 09 N | 078 55 50 W |
| Lowry Cove | Bay | 2 | Talbot | 38 39 20 N | 076 05 31 W |
| Lowrys Resurvey | Populated Place | 37 | Calvert | 38 35 45 N | 076 37 44 W |
| Lows Run | Stream | | St. Mary's | 38 19 53 N | 076 35 33 W |
| Loyola College | School | 99 | Baltimore (city) | 39 20 47 N | 076 37 09 W |
| Loyola High School | School | 128 | Baltimore | 39 24 04 N | 076 37 38 W |
| Loys | Populated Place | 114 | Frederick | 39 36 23 N | 077 21 09 W |
| Loys Station Covered Bridge | Bridge | 106 | Frederick | 39 36 32 N | 077 21 04 W |
| Loys Station Park | Park | 109 | Frederick | 39 36 32 N | 077 21 05 W |
| Lubavit Church Center for Jewish Education | Church | 135 | Howard | 39 17 48 N | 076 51 43 W |
| Lucabaugh Mill Reservoir | Reservoir | 221 | Carroll | 39 36 00 N | 076 57 47 W |
| Lucas Cove | Bay | 3 | St. Mary's | 38 09 48 N | 076 25 56 W |
| Lucas Heights | Populated Place | 276 | Allegany | 39 39 47 N | 078 48 57 W |
| Luce Creek | Bay | -3 | Anne Arundel | 39 00 29 N | 076 30 53 W |
| Luce Creek | Populated Place | 11 | Anne Arundel | 39 00 05 N | 076 31 12 W |
| Luce Hall | Building | 2 | Anne Arundel | 38 58 58 N | 076 28 54 W |
| Lucille Park | Park | 127 | Baltimore (city) | 39 20 24 N | 076 40 30 W |
| Luckton Landing | Building | 2 | St. Mary's | 38 22 57 N | 076 51 29 W |
| Luckton Point | Cape | 0 | St. Mary's | 38 23 08 N | 076 52 06 W |
| Luckton Run | Stream | | St. Mary's | 38 22 52 N | 076 51 26 W |
| Lucretia Kennard Residence Hall | Building | | Prince George's | 39 01 11 N | 076 45 31 W |
| Lucy Cove | Bay | 2 | Kent | 39 05 51 N | 076 13 04 W |
| Lucy Point | Cape | 0 | Talbot | 38 41 49 N | 076 13 10 W |
| Lucy V Barnsley Elementary School | School | 117 | Montgomery | 39 05 38 N | 077 06 13 W |
| Ludlow Ferry (historical) | Crossing | 4 | Charles | 38 21 42 N | 076 58 59 W |
| Luke | Populated Place | 294 | Allegany | 39 28 30 N | 079 03 25 W |
| Luke Police Department | Building | | Allegany | 39 47 36 N | 079 06 27 W |
| Luke Post Office | Post Office | 295 | Allegany | 39 28 24 N | 079 03 28 W |
| Luke Volunteer Fire Company | Building | | Allegany | 39 47 37 N | 079 06 30 W |
| Lum Estates | Populated Place | 74 | Cecil | 39 37 48 N | 075 56 16 W |
| Lumber Marsh | Swamp | 0 | Worcester | 38 11 35 N | 075 10 13 W |
| Lumber Marsh Island | Island | 0 | Worcester | 38 11 35 N | 075 10 12 W |
| Lurose Estates | Populated Place | 177 | Washington | 39 41 45 N | 077 41 17 W |
| Lusby | Populated Place | 32 | Calvert | 38 24 38 N | 076 27 19 W |
| Lusby Cove | Bay | -2 | Calvert | 38 20 19 N | 076 26 44 W |
| Lusby Crossroads | Populated Place | 32 | Anne Arundel | 38 59 16 N | 076 35 05 W |
| Lusby Point | Cape | 0 | Calvert | 38 20 05 N | 076 26 46 W |
| Lusby Post Office | Post Office | 37 | Calvert | 38 24 08 N | 076 26 26 W |
| Lutes | Populated Place | 122 | Montgomery | 39 04 12 N | 077 03 00 W |
| Lutes Run | Stream | | Montgomery | 39 04 34 N | 077 02 59 W |
| Luther Craven Mitchell Primary School | School | 20 | Baltimore (city) | 39 18 13 N | 076 35 28 W |
| Luther Memorial Lutheran Church | Church | 23 | Baltimore (city) | 39 17 13 N | 076 32 59 W |
| Lutheran Cemetery | Cemetery | 318 | Carroll | 39 39 46 N | 076 52 36 W |
| Lutheran Church of the Cross | Church | 132 | Montgomery | 39 04 11 N | 077 10 09 W |