Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Liberty Recreation Center | Park | 124 | Baltimore (city) | 39 19 34 N | 076 41 04 W |
| Liberty Road Volunteer Fire Company Station 46 | Building | | Baltimore | 39 23 02 N | 076 49 40 W |
| Liberty Trailer Park | Populated Place | 6 | Baltimore | 39 18 00 N | 076 30 14 W |
| Liberty View Farms | Populated Place | 160 | Carroll | 39 29 08 N | 076 53 19 W |
| Libertytown | Populated Place | 160 | Frederick | 39 29 06 N | 077 14 25 W |
| Libertytown | Populated Place | 7 | Worcester | 38 19 08 N | 075 17 55 W |
| Libertytown Branch | Stream | | Worcester | 38 20 04 N | 075 17 53 W |
| Libertytown Fire Company Number17 | Building | | Frederick | 40 02 18 N | 077 38 24 W |
| Libertytown Post Office | Post Office | 153 | Frederick | 39 29 03 N | 077 14 53 W |
| Libertytown Riverside Cemetery | Cemetery | 9 | Worcester | 38 19 43 N | 075 19 16 W |
| Libertytown Shopping Center | Locale | 180 | Frederick | 39 28 26 N | 077 16 10 W |
| Lick Run | Stream | | Allegany | 39 37 31 N | 078 34 01 W |
| Licking Creek | Stream | | Washington | 39 39 02 N | 078 02 59 W |
| Licking Creek | Stream | 109 | Washington | 39 39 01 N | 078 03 04 W |
| Licking Creek Aqueduct | Bridge | 114 | Washington | 39 39 04 N | 078 02 55 W |
| Liebno Estates | Populated Place | 146 | Carroll | 39 38 25 N | 077 06 42 W |
| Life Evangelical Church | Church | 127 | Baltimore (city) | 39 19 37 N | 076 40 59 W |
| Light Street Branch Enoch Pratt Free Library | Building | 14 | Baltimore (city) | 39 16 27 N | 076 36 43 W |
| Light Street Pavilion | Building | 0 | Baltimore (city) | 39 17 05 N | 076 36 44 W |
| Light Street Presbyterian Church | Church | 8 | Baltimore (city) | 39 16 47 N | 076 36 44 W |
| Lighthouse Academy | School | 14 | Talbot | 38 47 31 N | 076 03 59 W |
| Lighthouse Christian Bookstore | Building | | Prince George's | 38 58 41 N | 076 51 48 W |
| Lighting Knot Cove | Bay | -3 | Somerset | 38 00 58 N | 076 02 23 W |
| Lightwoods Creek | Stream | | Baltimore | 39 23 05 N | 076 24 54 W |
| Lillys Addition | Populated Place | 123 | Howard | 39 07 58 N | 076 52 28 W |
| Lillys Creek | Stream | | Dorchester | 38 12 16 N | 076 02 57 W |
| Lily Pons Bridge | Bridge | 61 | Frederick | 39 17 38 N | 077 26 15 W |
| Lily Pons Fish Ponds | Reservoir | 65 | Frederick | 39 17 45 N | 077 25 36 W |
| Lily Pons Spring | Spring | 87 | Frederick | 39 16 44 N | 077 27 54 W |
| Lily Pons Water Garden | Park | 68 | Frederick | 39 17 45 N | 077 25 54 W |
| Lilyan Stratton Corbin Public Library | Building | 1 | Somerset | 37 58 51 N | 075 50 32 W |
| Lilypons | Populated Place | 69 | Frederick | 39 17 42 N | 077 25 52 W |
| Lilypons Bridge | Bridge | 61 | Frederick | 39 17 35 N | 077 26 14 W |
| Lilypons Post Office (historical) | Post Office | 69 | Frederick | 39 17 43 N | 077 25 53 W |
| Lime Kilm Middle School | School | 135 | Howard | 39 09 17 N | 076 54 54 W |
| Lime Kiln | Populated Place | 84 | Frederick | 39 20 55 N | 077 25 32 W |
| Lime Kiln Valley | Populated Place | 115 | Howard | 39 09 15 N | 076 57 21 W |
| Limehouse Cove | Bay | 1 | Anne Arundel | 38 55 12 N | 076 30 59 W |
| Limehouse Cove | Bay | 3 | Baltimore | 39 19 57 N | 076 24 20 W |
| Limekiln Branch | Stream | | Montgomery | 39 00 25 N | 077 14 40 W |
| Limekiln Hollow | Valley | | Baltimore | 39 25 19 N | 076 32 18 W |
| Linchester | Populated Place | 1 | Caroline | 38 42 03 N | 075 53 46 W |
| Linchester Mill | Locale | 4 | Caroline | 38 42 03 N | 075 53 49 W |
| Linchester Mill Pond | Reservoir | 2 | Caroline | 38 42 04 N | 075 53 46 W |
| Lincoln | Populated Place | 43 | Prince George's | 38 57 47 N | 076 49 10 W |
| Lincoln Center | Building | 135 | Montgomery | 39 05 29 N | 077 08 56 W |
| Lincoln Elementary School | School | 93 | Frederick | 39 24 28 N | 077 24 53 W |
| Lincoln Heights | Populated Place | 26 | Anne Arundel | 38 59 53 N | 076 31 44 W |
| Lincoln Heights | Populated Place | 11 | Wicomico | 38 20 54 N | 075 35 13 W |
| Lincoln High School (historical) | School | 93 | Frederick | 39 24 28 N | 077 24 55 W |
| Lincoln Manor | Populated Place | 231 | Carroll | 39 37 44 N | 076 49 24 W |
| Lincoln Memorial Cemetery | Cemetery | 75 | Prince George's | 38 51 23 N | 076 56 51 W |
| Lincoln Memorial Nursing Home | Hospital | 29 | Baltimore (city) | 39 17 22 N | 076 38 14 W |
| Lincoln Park Community Center | Building | 127 | Montgomery | 39 05 40 N | 077 08 40 W |
| Lincoln School | School | 92 | Frederick | 39 24 29 N | 077 24 53 W |
| Lincoln School | School | 35 | Prince George's | 38 57 34 N | 076 49 22 W |
| Lincoln Terrace Park | Park | 131 | Montgomery | 39 05 39 N | 077 08 50 W |
| Lincolnshire School | School | 183 | Washington | 39 37 02 N | 077 45 33 W |
| Lincrest | Populated Place | 87 | Harford | 39 27 53 N | 076 22 39 W |
| Linda Manor (subdivision) | Populated Place | 9 | Wicomico | 38 19 35 N | 075 37 13 W |
| Lindale Junior High School | School | 50 | Anne Arundel | 39 11 35 N | 076 38 14 W |
| Lindamoor on the Severn | Populated Place | 13 | Anne Arundel | 39 00 05 N | 076 30 46 W |
| Lindbergh Center Business Park | Locale | 138 | Montgomery | 39 09 56 N | 077 08 16 W |
| Linden | Populated Place | 102 | Montgomery | 39 00 29 N | 077 02 57 W |
| Linden Chapel Hills | Populated Place | 160 | Howard | 39 13 52 N | 076 59 31 W |
| Linden Chapel Woods | Populated Place | 179 | Howard | 39 13 48 N | 076 59 00 W |
| Linden Church | Church | 171 | Howard | 39 13 50 N | 076 58 31 W |
| Linden Estates | Populated Place | 222 | Carroll | 39 38 55 N | 077 01 34 W |
| Linden Heights Church | Church | 107 | Baltimore | 39 24 18 N | 076 30 59 W |
| Linden Hills (subdivision) | Populated Place | 134 | Frederick | 39 24 55 N | 077 26 33 W |
| Linden Springs | Populated Place | 245 | Baltimore | 39 42 51 N | 076 43 03 W |
| Linden-Linthicum United Methodist Church | Church | 155 | Howard | 39 12 49 N | 076 56 05 W |
| Lindill Estates | Populated Place | 106 | Harford | 39 31 22 N | 076 21 09 W |
| Line Bridge Landing | Locale | 30 | Harford | 39 42 56 N | 076 14 34 W |
| Line Creek | Stream | | Wicomico | 38 17 48 N | 075 45 34 W |
| Line Ridge | Populated Place | 39 | Calvert | 38 37 55 N | 076 33 58 W |
| Line Run | Stream | | Allegany | 39 43 09 N | 078 26 36 W |
| Line Run | Stream | | Allegany | 39 43 09 N | 078 26 37 W |
| Lineboro | Populated Place | 210 | Carroll | 39 43 07 N | 076 50 38 W |
| Lineboro Post Office | Post Office | 208 | Carroll | 39 43 06 N | 076 50 39 W |
| Lineboro Spring | Spring | 242 | Carroll | 39 43 06 N | 076 51 01 W |
| Lineboro Volunteer Fire Department Station 7 | Building | | Carroll | 40 12 23 N | 077 24 51 W |
| Linganore | Populated Place | 147 | Frederick | 39 26 25 N | 077 12 29 W |
| Linganore Chapel Cemetery | Cemetery | 148 | Frederick | 39 28 48 N | 077 11 06 W |
| Linganore Creek | Stream | | Frederick | 39 24 26 N | 077 21 55 W |
| Linganore High School | School | 174 | Frederick | 39 25 58 N | 077 14 51 W |
| Linganore Mill (historical) | Locale | 73 | Frederick | 39 24 32 N | 077 21 38 W |
| Linganore United Methodist Church | Church | 151 | Frederick | 39 28 47 N | 077 11 07 W |
| Linganore View | Populated Place | 190 | Frederick | 39 22 10 N | 077 13 59 W |
| Linganore Woods | Populated Place | 138 | Frederick | 39 26 55 N | 077 12 49 W |
| Linhigh | Populated Place | 49 | Baltimore | 39 21 29 N | 076 30 49 W |
| Linkwood | Populated Place | 6 | Dorchester | 38 32 23 N | 075 56 46 W |
| Linkwood Post Office | Post Office | 6 | Dorchester | 38 32 29 N | 075 56 48 W |
| Linkwood State Wildlife Management Area | Reserve | 7 | Dorchester | 38 32 23 N | 075 55 32 W |
| Linover Park | Park | 35 | Baltimore | 39 21 36 N | 076 30 31 W |
| Linstead-on-the-Severn | Populated Place | 9 | Anne Arundel | 39 03 53 N | 076 33 38 W |
| Linthicum | Populated Place | 42 | Anne Arundel | 39 12 18 N | 076 39 10 W |
| Linthicum Baptist Church | Church | 48 | Anne Arundel | 39 11 52 N | 076 39 20 W |
| Linthicum Branch Library | Building | 48 | Anne Arundel | 39 12 05 N | 076 39 29 W |
| Linthicum Cemetery | Cemetery | 157 | Howard | 39 12 56 N | 076 55 56 W |
| Linthicum Chapel | Church | 156 | Howard | 39 12 23 N | 076 56 36 W |
| Linthicum Elementary School | School | 49 | Anne Arundel | 39 12 08 N | 076 39 10 W |
| Linthicum Fire Company 32 | Building | | Anne Arundel | 39 12 07 N | 076 39 15 W |
| Linthicum Hall | Building | 125 | Baltimore | 39 23 39 N | 076 36 29 W |
| Linthicum Heights | Populated Place | 48 | Anne Arundel | 39 12 12 N | 076 39 44 W |
| Linthicum Heights Post Office | Post Office | 45 | Anne Arundel | 39 12 02 N | 076 39 17 W |
| Linthicum Heights United Methodist Church | Church | 53 | Anne Arundel | 39 12 12 N | 076 39 06 W |
| Linthicum Hills | Populated Place | 25 | Anne Arundel | 39 13 04 N | 076 39 08 W |
| Linthicum Oaks | Populated Place | 46 | Anne Arundel | 39 12 00 N | 076 39 04 W |
| Linthicum Volunteer Fire Company 32 | Building | | Anne Arundel | 39 20 20 N | 077 05 41 W |