Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Lowery House (historical) | Building | 19 | District of Columbia | 38 54 10 N | 077 02 03 W |
| Loyola Hall | Building | | District of Columbia | 38 54 22 N | 077 04 10 W |
| Lucinda Cady House | Building | 82 | District of Columbia | 38 58 38 N | 077 01 03 W |
| Ludlow School (historical) | School | 12 | District of Columbia | 38 53 55 N | 076 59 54 W |
| Ludlow-Taylor Elementary School | School | 12 | District of Columbia | 38 53 54 N | 076 59 44 W |
| Ludlow/Taylor Recreation Center | Park | 11 | District of Columbia | 38 53 56 N | 076 59 45 W |
| Luther Place Memorial Church | Church | 28 | District of Columbia | 38 54 24 N | 077 01 54 W |
| Luther Statue | Park | 27 | District of Columbia | 38 54 22 N | 077 01 51 W |
| Lutheran Church of the Holy Comforter | Church | 89 | District of Columbia | 38 51 42 N | 076 57 34 W |
| Lutheran Church of the Reformation | Church | 27 | District of Columbia | 38 53 24 N | 077 00 11 W |
| Lutheran English Church (historical) | Church | 14 | District of Columbia | 38 53 58 N | 077 01 39 W |
| Luzon Apartment Building | Building | 20 | District of Columbia | 38 54 15 N | 077 03 12 W |
| Lyndon Baines Johnson Memorial Grove | Park | 3 | District of Columbia | 38 52 40 N | 077 03 04 W |
| Lyons Mill (historical) | Building | 5 | District of Columbia | 38 54 46 N | 077 03 14 W |
| M C Terrell Elementary School | School | 48 | District of Columbia | 38 50 28 N | 076 59 40 W |
| M L King Recreation Center | Park | 5 | District of Columbia | 38 52 27 N | 077 00 48 W |
| M M Washington High School | School | 19 | District of Columbia | 38 54 32 N | 077 00 36 W |
| M Street Bridge | Bridge | 5 | District of Columbia | 38 54 19 N | 077 03 21 W |
| M Street High School (historical) | School | 27 | District of Columbia | 38 54 20 N | 077 01 43 W |
| MacArthur Theature | Building | 51 | District of Columbia | 38 55 31 N | 077 06 04 W |
| MacFarland Middle School | School | 58 | District of Columbia | 38 56 36 N | 077 01 38 W |
| Mackall Place | Building | 37 | District of Columbia | 38 54 38 N | 077 03 30 W |
| Mackall Square | Building | 47 | District of Columbia | 38 54 44 N | 077 03 30 W |
| Mackall-Worthington House | Building | 60 | District of Columbia | 38 54 49 N | 077 03 54 W |
| Mackin High School | School | 34 | District of Columbia | 38 55 06 N | 077 01 59 W |
| Macomb Playground | Park | 97 | District of Columbia | 38 56 01 N | 077 04 02 W |
| Macomb Recreation Center | Park | 96 | District of Columbia | 38 56 01 N | 077 04 01 W |
| Maddox Branch | Stream | | District of Columbia | 38 55 08 N | 077 06 10 W |
| Mades Hotel (historical) | Building | 4 | District of Columbia | 38 53 28 N | 077 00 56 W |
| Madison Hall | Building | | District of Columbia | 38 53 57 N | 077 02 57 W |
| Madison School | School | 13 | District of Columbia | 38 53 54 N | 076 59 32 W |
| Magazine Wharf | Locale | 2 | District of Columbia | 38 53 02 N | 076 58 13 W |
| Magner House | Building | 62 | District of Columbia | 38 56 11 N | 076 59 54 W |
| Maguire Building | Building | 46 | District of Columbia | 38 54 25 N | 077 04 24 W |
| Maguire Hall | Building | | District of Columbia | 38 54 25 N | 077 04 23 W |
| Main Navy and Munitions Buildings (historical) | Building | 4 | District of Columbia | 38 53 27 N | 077 02 34 W |
| Maine Avenue Armory (historical) | Military (Historical) | 1 | District of Columbia | 38 52 22 N | 077 01 13 W |
| Maine Avenue Fish Market | Locale | 2 | District of Columbia | 38 52 51 N | 077 01 40 W |
| Maine Lobsterman Memorial | Park | 3 | District of Columbia | 38 52 36 N | 077 01 18 W |
| Major General Comte Jean De Rochambreau Statue | Park | 17 | District of Columbia | 38 53 56 N | 077 02 14 W |
| Major General Friedrich Wilhelm von Steuben Statue | Park | 17 | District of Columbia | 38 53 56 N | 077 02 11 W |
| Major General George B McClellan Statue | Park | 49 | District of Columbia | 38 55 00 N | 077 02 47 W |
| Major General George Thomas Statue | Park | 27 | District of Columbia | 38 54 21 N | 077 01 55 W |
| Major General John A Logan Statue | Park | 29 | District of Columbia | 38 54 35 N | 077 01 46 W |
| Major General John A Rawlins Statue | Park | 12 | District of Columbia | 38 53 44 N | 077 02 34 W |
| Major General Marquis Gilbert De Lafayette Statue | Park | 16 | District of Columbia | 38 53 56 N | 077 02 06 W |
| Major General Nathanael Green Statue | Park | 26 | District of Columbia | 38 53 36 N | 076 59 60 W |
| Major General Winfield Scott Hancock Statue | Park | 4 | District of Columbia | 38 53 36 N | 077 01 20 W |
| Major Walter Reed Memorial | Park | 79 | District of Columbia | 38 59 20 N | 077 02 10 W |
| Malawi Embassy | Building | 29 | District of Columbia | 38 54 54 N | 077 03 18 W |
| Malcolm X Elementary School | School | 58 | District of Columbia | 38 50 41 N | 076 59 09 W |
| Malcolm X Recreation Center | Park | 57 | District of Columbia | 38 50 42 N | 076 59 08 W |
| Mall Skating Rink | Locale | 4 | District of Columbia | 38 53 28 N | 077 01 23 W |
| Maloney Hall | Building | 53 | District of Columbia | 38 56 00 N | 076 59 46 W |
| Mamie D Lee School | School | 66 | District of Columbia | 38 57 09 N | 077 00 39 W |
| Man Controlling Trade Sculpture | Park | 4 | District of Columbia | 38 53 31 N | 077 01 08 W |
| Man Pushing the Door Sculpture | Park | 7 | District of Columbia | 38 53 19 N | 077 01 24 W |
| Manassas Panorama Building (historical) | Building | 4 | District of Columbia | 38 53 37 N | 077 01 59 W |
| Manor Park | Populated Place | 65 | District of Columbia | 38 57 50 N | 077 00 57 W |
| Marbury Plaza | Locale | 30 | District of Columbia | 38 52 00 N | 076 58 29 W |
| Marbury Point | Cape | 2 | District of Columbia | 38 48 55 N | 077 01 42 W |
| Maret School | School | 83 | District of Columbia | 38 55 40 N | 077 03 32 W |
| Margaret Wetzel House | Building | 20 | District of Columbia | 38 53 56 N | 077 02 48 W |
| Marian Scholasticate | Church | 72 | District of Columbia | 38 56 16 N | 077 00 03 W |
| Marie H Reed Recreation Center | Park | 42 | District of Columbia | 38 55 10 N | 077 02 27 W |
| Marine Corps Barracks | Building | 20 | District of Columbia | 38 52 49 N | 076 59 38 W |
| Marine Corps Commandants House | Building | 19 | District of Columbia | 38 52 47 N | 076 59 41 W |
| Marine Corps Museum and Historical Center | Building | 14 | District of Columbia | 38 52 37 N | 076 59 37 W |
| Marine Hospital (historical) | Hospital | 9 | District of Columbia | 38 53 06 N | 076 58 25 W |
| Marine Hospital Square (historical) | Locale | 12 | District of Columbia | 38 52 55 N | 076 58 29 W |
| Marine Science Building | Building | 5 | District of Columbia | 38 52 32 N | 077 00 17 W |
| Marinis Hall (historical) | Building | 6 | District of Columbia | 38 53 45 N | 077 01 30 W |
| Marion Park | Park | 22 | District of Columbia | 38 52 58 N | 076 59 58 W |
| Marist Annex | Building | 74 | District of Columbia | 38 56 20 N | 077 00 02 W |
| Marist College | School | 73 | District of Columbia | 38 56 18 N | 077 00 01 W |
| Marist Hall | Building | 74 | District of Columbia | 38 56 19 N | 077 00 01 W |
| Marist Seminary | School | 87 | District of Columbia | 38 56 28 N | 077 00 14 W |
| Marjorie Webster Junior College (historical) | School | 70 | District of Columbia | 38 59 05 N | 077 02 15 W |
| Market Bridge (historical) | Bridge | 4 | District of Columbia | 38 53 31 N | 077 01 11 W |
| Market Square | Locale | 20 | District of Columbia | 38 53 59 N | 077 02 34 W |
| Market Square | Locale | 5 | District of Columbia | 38 53 37 N | 077 01 23 W |
| Market Street Chapel (historical) | Church | 38 | District of Columbia | 38 54 36 N | 077 03 58 W |
| Marshall Education Center | School | 40 | District of Columbia | 38 55 42 N | 076 57 22 W |
| Marshall Heights | Populated Place | 47 | District of Columbia | 38 53 10 N | 076 55 41 W |
| Martha Washington Seminary | School | 50 | District of Columbia | 38 56 10 N | 077 02 16 W |
| Martin Luther King Junior Memorial | Park | 3 | District of Columbia | 38 53 12 N | 077 02 37 W |
| Martin Luther King Junior Memorial Library | Building | 13 | District of Columbia | 38 53 55 N | 077 01 28 W |
| Martin Luther Statue | Park | 26 | District of Columbia | 38 54 20 N | 077 01 55 W |
| Marvin Center Theatre - George Washington University | Building | 21 | District of Columbia | 38 54 01 N | 077 02 49 W |
| Mary Church Terrell House | Building | 27 | District of Columbia | 38 54 57 N | 077 00 57 W |
| Mary Church Terrell Recreation Center | Park | 52 | District of Columbia | 38 50 31 N | 076 59 41 W |
| Mary E Switzer Building | Building | 4 | District of Columbia | 38 53 09 N | 077 00 59 W |
| Mary Graydon Center | Building | 116 | District of Columbia | 38 56 12 N | 077 05 20 W |
| Mary Livingston Ripley Garden | Park | 7 | District of Columbia | 38 53 17 N | 077 01 25 W |
| Mary McLeod Bethune Council House | Building | 28 | District of Columbia | 38 54 30 N | 077 01 50 W |
| Mary McLeod Bethune Statue | Park | 27 | District of Columbia | 38 53 23 N | 076 59 20 W |
| Mary Surratt House | Building | 14 | District of Columbia | 38 53 59 N | 077 01 13 W |
| Mary Thornberry Building | Building | | District of Columbia | 38 54 28 N | 076 59 40 W |
| Maryland Avenue Baptist Church | Church | 14 | District of Columbia | 38 53 58 N | 076 59 09 W |
| Maryland House (historical) | Building | 29 | District of Columbia | 38 54 58 N | 077 01 17 W |
| Masonic and Eastern Star Home | Locale | 76 | District of Columbia | 38 57 49 N | 077 00 20 W |
| Masonic Lodge | Building | 14 | District of Columbia | 38 54 16 N | 077 03 38 W |
| Masons Ferry (historical) | Crossing | 3 | District of Columbia | 38 54 07 N | 077 03 46 W |
| Massachusetts Avenue Bridge | Bridge | 18 | District of Columbia | 38 55 04 N | 077 03 30 W |
| Massachusetts Avenue Heights | Populated Place | 71 | District of Columbia | 38 55 35 N | 077 03 54 W |
| Matthews Memorial Baptist Church | Church | 15 | District of Columbia | 38 51 40 N | 076 59 35 W |
| Maury Elementary School | School | 26 | District of Columbia | 38 53 31 N | 076 59 19 W |
| Maury Recreation Center | Park | 26 | District of Columbia | 38 53 34 N | 076 59 19 W |
| Mausoleum Square | Locale | 15 | District of Columbia | 38 54 00 N | 077 01 31 W |
| Maxwell Woodhull House | Building | 37 | District of Columbia | 38 55 55 N | 077 02 46 W |