Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| May-Smallwood House (historical) | Building | 5 | District of Columbia | 38 53 02 N | 077 00 57 W |
| Mayfair Mansions | Building | 8 | District of Columbia | 38 54 03 N | 076 56 37 W |
| Mayfair-Parkside | Populated Place | 7 | District of Columbia | 38 54 05 N | 076 56 59 W |
| Mayflower Hotel | Building | 17 | District of Columbia | 38 54 19 N | 077 02 27 W |
| Mays Building (historical) | Building | 12 | District of Columbia | 38 53 46 N | 077 01 18 W |
| Mazza Gallerie | Locale | 101 | District of Columbia | 38 57 30 N | 077 05 06 W |
| McCabe Hall | Building | 115 | District of Columbia | 38 56 06 N | 077 05 23 W |
| McCarthy Hall | Building | | District of Columbia | 38 54 25 N | 077 04 31 W |
| McCleery House | Building | 6 | District of Columbia | 38 54 12 N | 077 03 33 W |
| McClellan Circle | Locale | 47 | District of Columbia | 38 55 00 N | 077 00 24 W |
| McCormack Plaza | Locale | 50 | District of Columbia | 38 56 06 N | 076 59 51 W |
| McCormich House (Brazilian Embassy) | Building | 44 | District of Columbia | 38 55 08 N | 077 03 38 W |
| McCormick Apartments | Building | 25 | District of Columbia | 38 54 34 N | 077 02 28 W |
| McCort-Ward Building | Building | 53 | District of Columbia | 38 56 01 N | 076 59 47 W |
| McDonald House | Building | 58 | District of Columbia | 38 56 13 N | 076 59 53 W |
| McDonough Gymnasium | Building | | District of Columbia | 38 54 27 N | 077 04 40 W |
| McDowell Hall | Building | 108 | District of Columbia | 38 56 19 N | 077 05 21 W |
| McGees Ferry (historical) | Locale | 2 | District of Columbia | 38 54 00 N | 077 03 30 W |
| McGill Building (historical) | Building | 13 | District of Columbia | 38 53 53 N | 077 01 29 W |
| McGogney Elementary School | School | 28 | District of Columbia | 38 50 21 N | 076 59 33 W |
| McGregor Building | Building | 18 | District of Columbia | 38 54 10 N | 077 02 52 W |
| McKendree Chapel (historical) | Church | 22 | District of Columbia | 38 54 12 N | 077 01 30 W |
| McKendree United Methodist Church | Church | 42 | District of Columbia | 38 55 54 N | 076 58 19 W |
| McKenney House | Building | 31 | District of Columbia | 38 54 26 N | 077 03 44 W |
| McKenny House | Building | 32 | District of Columbia | 38 54 28 N | 077 03 43 W |
| McKeown Hotel (historical) | Building | 5 | District of Columbia | 38 53 34 N | 077 01 12 W |
| McKinley Building | Building | 117 | District of Columbia | 38 56 10 N | 077 05 23 W |
| McKinley Circle (historical) | Locale | 51 | District of Columbia | 38 56 19 N | 076 58 12 W |
| McKinley/Penn Senior High School | School | 47 | District of Columbia | 38 54 53 N | 077 00 16 W |
| McLachlen Building | Building | 12 | District of Columbia | 38 53 53 N | 077 01 35 W |
| McLean Gardens | Populated Place | 114 | District of Columbia | 38 56 14 N | 077 04 31 W |
| McLean Playground | Park | 107 | District of Columbia | 38 56 05 N | 077 04 34 W |
| McMahon Hall | Building | 65 | District of Columbia | 38 56 05 N | 076 59 58 W |
| McMillan Park (historical) | Park | 53 | District of Columbia | 38 55 27 N | 077 00 38 W |
| McMillan Reservoir | Reservoir | 44 | District of Columbia | 38 55 30 N | 077 01 02 W |
| McNeir Auditorium | Building | | District of Columbia | 38 54 27 N | 077 04 28 W |
| McPherson Square | Park | 20 | District of Columbia | 38 54 06 N | 077 02 01 W |
| McPherson Square Metro Station | Locale | 19 | District of Columbia | 38 54 04 N | 077 02 01 W |
| McSherry Building | Building | | District of Columbia | 38 54 24 N | 077 04 27 W |
| Meade Circle | Locale | 59 | District of Columbia | 38 55 34 N | 077 02 12 W |
| Meadow Bank Spa Springs (historical) | Locale | 15 | District of Columbia | 38 55 00 N | 076 58 29 W |
| Meadowbrook Riding Stable | Building | 54 | District of Columbia | 38 59 20 N | 077 03 39 W |
| Media and Public Affairs Building | Building | | District of Columbia | 38 53 59 N | 077 02 47 W |
| Medical and Dental Annex | Building | | District of Columbia | 38 54 43 N | 077 04 39 W |
| Medical and Dental Building | Building | | District of Columbia | 38 54 42 N | 077 04 38 W |
| MedLink Hospital at Capitol Hill | Hospital | 24 | District of Columbia | 38 53 32 N | 076 59 44 W |
| Meeting House of the Friends Meeting | Church | 32 | District of Columbia | 38 54 48 N | 077 02 51 W |
| Meigs House (historical) | Building | 28 | District of Columbia | 38 54 25 N | 077 01 51 W |
| Melvin C Hazen Park | Park | 54 | District of Columbia | 38 56 22 N | 077 03 30 W |
| Melvin Gelman Library | Building | | District of Columbia | 38 53 57 N | 077 02 54 W |
| Mercantile Savings Bank | Building | 15 | District of Columbia | 38 53 57 N | 077 01 31 W |
| Meridian Hill Park | Park | 59 | District of Columbia | 38 55 16 N | 077 02 07 W |
| Meridian House International | Building | 51 | District of Columbia | 38 55 15 N | 077 02 13 W |
| Meridian Mansions | Building | 53 | District of Columbia | 38 55 17 N | 077 02 12 W |
| Merrill Learning Center | Building | | District of Columbia | 38 54 26 N | 076 59 38 W |
| Merritt Education Center | School | 23 | District of Columbia | 38 54 01 N | 076 55 43 W |
| Methodist Cemetery (historical) | Cemetery | 101 | District of Columbia | 38 56 56 N | 077 05 04 W |
| Methodist Home | Building | 98 | District of Columbia | 38 57 14 N | 077 04 06 W |
| Methodist Protestant Church | Church | 18 | District of Columbia | 38 52 46 N | 076 59 42 W |
| Methodist Protestant Church | Church | 9 | District of Columbia | 38 53 47 N | 077 01 27 W |
| Metro Center Metro Station | Locale | 12 | District of Columbia | 38 53 53 N | 077 01 43 W |
| Metropolis Bank (historical) | Building | 13 | District of Columbia | 38 53 52 N | 077 02 01 W |
| Metropolis View | Populated Place | 57 | District of Columbia | 38 55 40 N | 077 00 01 W |
| Metropolitan African Methodist Episcopal Church | Church | 21 | District of Columbia | 38 54 20 N | 077 02 08 W |
| Metropolitan Baptist Church | Church | 28 | District of Columbia | 38 54 46 N | 077 01 45 W |
| Metropolitan Club | Building | 20 | District of Columbia | 38 54 00 N | 077 02 24 W |
| Metropolitan Complex Heliport | Airport | 22 | District of Columbia | 38 54 37 N | 077 00 24 W |
| Metropolitan Memorial United Methodist Church | Church | 117 | District of Columbia | 38 56 06 N | 077 05 16 W |
| Metropolitan Methodist Church | Church | 21 | District of Columbia | 38 54 19 N | 077 02 08 W |
| Metropolitan Theatre (historical) | Building | 11 | District of Columbia | 38 53 50 N | 077 01 29 W |
| Metropolitan Wesley African Methodist Episcopal Zion Church | Church | 34 | District of Columbia | 38 54 57 N | 077 00 34 W |
| Metrotone Baptist Church | Church | 48 | District of Columbia | 38 53 11 N | 076 55 36 W |
| Metzerott Hall (historical) | Building | 4 | District of Columbia | 38 53 37 N | 077 01 28 W |
| Meurs (historical) | Civil | 10 | District of Columbia | 38 53 30 N | 076 58 34 W |
| Mexican Cultural Institute | Building | 60 | District of Columbia | 38 55 32 N | 077 02 08 W |
| Mexico (historical) | Civil | 17 | District of Columbia | 38 54 00 N | 077 03 02 W |
| Meyer Elementary School | School | 47 | District of Columbia | 38 55 22 N | 077 01 35 W |
| Michigan Park | Populated Place | 27 | District of Columbia | 38 56 55 N | 076 59 09 W |
| Michler Place | Building | 22 | District of Columbia | 38 53 51 N | 077 02 54 W |
| Mid City Post Office | Post Office | 27 | District of Columbia | 38 54 33 N | 077 01 56 W |
| Military Road School | School | 79 | District of Columbia | 38 57 43 N | 077 01 55 W |
| Milkhouse Ford | Locale | 45 | District of Columbia | 38 57 54 N | 077 02 51 W |
| Mill Seat (historical) | Civil | 18 | District of Columbia | 38 56 24 N | 077 03 04 W |
| Mill Tract (historical) | Civil | 14 | District of Columbia | 38 54 20 N | 077 00 16 W |
| Millennium North Hall | Building | 53 | District of Columbia | 38 56 14 N | 076 59 50 W |
| Millennium South Hall | Building | 51 | District of Columbia | 38 56 14 N | 076 59 49 W |
| Miller Cabin | Building | 49 | District of Columbia | 38 57 50 N | 077 02 44 W |
| Miller Cottage | Building | 31 | District of Columbia | 38 54 35 N | 077 03 26 W |
| Miller House | Building | 24 | District of Columbia | 38 54 42 N | 077 02 57 W |
| Mills Building | Building | 16 | District of Columbia | 38 53 54 N | 077 02 23 W |
| Mills Station (historical) | Locale | 29 | District of Columbia | 38 55 28 N | 076 58 12 W |
| Miner Elementary School | School | 12 | District of Columbia | 38 53 51 N | 076 58 59 W |
| Miner Hall (historical) | Building | 48 | District of Columbia | 38 55 21 N | 077 01 19 W |
| Miner Normal School (historical) | School | 27 | District of Columbia | 38 54 56 N | 077 01 17 W |
| Miner Teachers College (historical) | School | 55 | District of Columbia | 38 55 25 N | 077 01 19 W |
| Minnesota Avenue Metro Station | Locale | 13 | District of Columbia | 38 53 55 N | 076 56 54 W |
| Minute Man Statue | Park | 10 | District of Columbia | 38 53 53 N | 077 00 35 W |
| Miss Lydia Englishs Seminary (historical) | School | 22 | District of Columbia | 38 54 23 N | 077 03 33 W |
| Mitchell Park | Park | 48 | District of Columbia | 38 54 52 N | 077 02 58 W |
| Mitchell Park Recreation Center | Park | 47 | District of Columbia | 38 54 52 N | 077 02 59 W |
| Mitchells Boys School (historical) | School | 26 | District of Columbia | 38 54 24 N | 077 03 47 W |
| Mohandas K Gandhi Statue | Park | 25 | District of Columbia | 38 54 40 N | 077 02 48 W |
| Monastery Lot (historical) | Populated Place | 24 | District of Columbia | 38 55 10 N | 076 58 24 W |
| Monroe Hall | Building | | District of Columbia | 38 53 55 N | 077 02 51 W |
| Monroe House (historical) | Building | 22 | District of Columbia | 38 54 03 N | 077 02 46 W |
| Montana Terrace Recreation Center | Park | 20 | District of Columbia | 38 55 04 N | 076 58 42 W |
| Montello Station (historical) | Locale | 31 | District of Columbia | 38 55 36 N | 076 58 05 W |
| Montgomery Blair Portal | Park | 63 | District of Columbia | 38 59 21 N | 077 02 24 W |
| Montgomery Elementary School | School | 24 | District of Columbia | 38 54 36 N | 077 01 04 W |
| Montgomery Tavern (historical) | Building | 26 | District of Columbia | 38 54 26 N | 077 03 48 W |