Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Magnolia Street Graded School (historical) | School | 200 | Greenwood | 34 11 24 N | 082 09 27 W |
| Magnolia-on-the-Ashley | Locale | 4 | Charleston | 32 52 32 N | 080 04 56 W |
| Mahaffey Lake | Reservoir | 244 | Oconee | 34 42 38 N | 082 57 09 W |
| Maham Lake | Lake | 9 | Berkeley | 33 29 35 N | 080 01 22 W |
| Maham Swamp | Swamp | 16 | Berkeley | 33 26 54 N | 080 02 04 W |
| Mahan Plantation Cemetery | Cemetery | 23 | Berkeley | 33 26 45 N | 080 03 16 W |
| Maidendown Bay | Swamp | 32 | Marion | 34 13 24 N | 079 19 44 W |
| Maidendown Swamp | Stream | | Dillon | 34 15 35 N | 079 15 14 W |
| Main Creek | Gut | -3 | Georgetown | 33 33 01 N | 079 01 31 W |
| Main Line Ditch | Canal | 53 | Richland | 34 03 42 N | 081 05 21 W |
| Main Street Grammar School (historical) | School | 194 | Union | 34 42 57 N | 081 37 11 W |
| Main Street Historic District | Park | 159 | Newberry | 34 16 37 N | 081 36 47 W |
| Main Street Methodist Church | Church | 50 | Bamberg | 33 17 36 N | 081 02 10 W |
| Main Street Methodist Church | Church | 59 | Marlboro | 34 40 07 N | 079 32 51 W |
| Main Street United Methodist Church | Church | 183 | Abbeville | 34 10 46 N | 082 22 50 W |
| Main Street United Methodist Church | Church | 35 | Dillon | 34 24 57 N | 079 22 06 W |
| Main Street United Methodist Church | Church | 202 | Greenwood | 34 11 42 N | 082 09 42 W |
| Main Street United Methodist Church | Church | 94 | Richland | 34 00 38 N | 081 02 13 W |
| Main Street United Methodist Church | Church | 203 | York | 34 55 46 N | 081 01 55 W |
| Majority Baptist Church | Church | 225 | Spartanburg | 34 56 29 N | 081 55 32 W |
| Majors Post Office (historical) | Post Office | 288 | Anderson | 34 43 33 N | 082 40 29 W |
| Malady Bush Island | Island | 1 | Georgetown | 33 16 11 N | 079 13 50 W |
| Malcolm C Hursey Elementary School | School | 7 | Charleston | 32 52 33 N | 079 59 26 W |
| Malibu | Populated Place | 41 | Florence | 34 11 38 N | 079 42 27 W |
| Malina School | School | 32 | Clarendon | 33 50 23 N | 080 05 42 W |
| Mall Playground | Park | 5 | Charleston | 32 47 46 N | 079 56 10 W |
| Mallard Bay | Populated Place | 129 | Lexington | 34 02 06 N | 081 22 56 W |
| Mallory | Populated Place | 36 | Dillon | 34 23 19 N | 079 30 47 W |
| Mallory Church of God | Church | 37 | Dillon | 34 22 46 N | 079 31 15 W |
| Mallory Cross Roads | Locale | 38 | Dillon | 34 23 01 N | 079 31 02 W |
| Malone Chapel | Church | 73 | Richland | 34 00 44 N | 080 59 31 W |
| Maloney Church | Church | 83 | Orangeburg | 33 38 14 N | 081 08 47 W |
| Maloney School (historical) | School | 83 | Orangeburg | 33 38 15 N | 081 08 50 W |
| Malpus Island | Area | 18 | Berkeley | 33 12 01 N | 079 49 52 W |
| Malta | Populated Place | 27 | Sumter | 33 52 38 N | 080 35 02 W |
| Malvern Hill Baptist Church | Church | 84 | Kershaw | 34 16 30 N | 080 33 30 W |
| Malvern Hill School | School | 87 | Kershaw | 34 16 31 N | 080 33 22 W |
| Mamie P Whitesides Elementary School | School | 4 | Charleston | 32 47 51 N | 079 51 08 W |
| Manbess Church | Church | 13 | Williamsburg | 33 43 43 N | 079 27 40 W |
| Manchester Creek | Stream | | York | 34 57 22 N | 080 56 56 W |
| Manchester School | School | 57 | Sumter | 33 44 28 N | 080 27 58 W |
| Manchester School (historical) | School | 61 | Sumter | 33 49 29 N | 080 31 19 W |
| Manchester State Forest | Forest | 53 | Sumter | 33 48 16 N | 080 31 04 W |
| Manchester State Forest Headquarters | Locale | 67 | Sumter | 33 49 24 N | 080 32 02 W |
| Mandel Hall | Populated Place | 74 | Richland | 34 03 57 N | 081 06 39 W |
| Mandel Park | Populated Place | 87 | Richland | 34 03 43 N | 081 07 03 W |
| Mandel Park Pond D-0584 Dam | Dam | 76 | Richland | 33 59 25 N | 080 50 35 W |
| Mangum Branch | Stream | | Chesterfield | 34 43 55 N | 080 21 25 W |
| Mangum Branch | Stream | | Chesterfield | 34 46 31 N | 080 27 01 W |
| Mangum School (historical) | School | 176 | Chesterfield | 34 48 20 N | 080 25 57 W |
| Mangums (historical) | Populated Place | 173 | Chesterfield | 34 45 49 N | 080 20 27 W |
| Manhaven Church | Church | 104 | Kershaw | 34 18 46 N | 080 23 58 W |
| Manigault Branch | Stream | | Hampton | 32 35 28 N | 081 19 19 W |
| Manigault Neck | Cape | 4 | Beaufort | 32 21 27 N | 080 52 05 W |
| Mann Cemetery | Cemetery | 93 | Fairfield | 34 14 06 N | 081 10 33 W |
| Mannheim School | School | 26 | Florence | 33 54 18 N | 079 37 42 W |
| Manning | Populated Place | 38 | Clarendon | 33 41 43 N | 080 12 39 W |
| Manning Acres | Populated Place | 276 | Spartanburg | 34 55 12 N | 082 11 07 W |
| Manning Baptist Church | Church | 38 | Clarendon | 33 41 44 N | 080 12 48 W |
| Manning Baptist Church | Church | 34 | Dillon | 34 24 50 N | 079 22 14 W |
| Manning Bay | Swamp | 33 | Dillon | 34 22 49 N | 079 18 39 W |
| Manning Branch | Stream | | Cherokee | 35 04 17 N | 081 26 47 W |
| Manning Cemetery | Cemetery | 36 | Clarendon | 33 42 10 N | 080 12 21 W |
| Manning Church (historical) | Church | 38 | Dillon | 34 26 46 N | 079 32 07 W |
| Manning Correctional Institute | Locale | 100 | Richland | 34 04 48 N | 080 59 25 W |
| Manning Crossroads | Populated Place | 46 | Dillon | 34 28 25 N | 079 27 37 W |
| Manning Hall | Building | 234 | Pickens | 34 40 39 N | 082 49 57 W |
| Manning High School | School | 38 | Clarendon | 33 42 07 N | 080 12 42 W |
| Manning Library | Building | 39 | Clarendon | 33 41 57 N | 080 12 39 W |
| Manning Methodist Church | Church | 37 | Clarendon | 33 41 49 N | 080 12 36 W |
| Manning Middle School | School | 37 | Clarendon | 33 41 50 N | 080 13 08 W |
| Manning Presbyterian Church | Church | 39 | Clarendon | 33 42 01 N | 080 12 39 W |
| Manning Primary School | School | 38 | Clarendon | 33 41 53 N | 080 12 51 W |
| Manning School (historical) | School | 31 | Dillon | 34 21 58 N | 079 21 28 W |
| Manning School (historical) | School | 33 | Dillon | 34 22 05 N | 079 22 57 W |
| Manning School (historical) | School | 57 | Lee | 34 05 54 N | 080 17 52 W |
| Manning Training School (historical) | School | 38 | Clarendon | 33 41 49 N | 080 13 09 W |
| Manns Branch | Stream | | Fairfield | 34 14 14 N | 081 11 30 W |
| Manor Creek | Stream | | Abbeville | 34 02 42 N | 082 35 57 W |
| Mansfield Park | Populated Place | 307 | Greenville | 34 51 09 N | 082 26 47 W |
| Mansfield Plantation | Locale | 2 | Georgetown | 33 26 06 N | 079 15 35 W |
| Manuel Church | Church | 4 | Colleton | 32 44 50 N | 080 27 29 W |
| Manuels School (historical) | School | 2 | Georgetown | 33 12 33 N | 079 14 57 W |
| Manville | Populated Place | 63 | Lee | 34 09 15 N | 080 18 12 W |
| Maple | Populated Place | 280 | Greenville | 34 55 46 N | 082 14 12 W |
| Maple Bay | Swamp | 32 | Florence | 34 01 56 N | 079 41 48 W |
| Maple Branch | Stream | | Kershaw | 34 17 01 N | 080 26 54 W |
| Maple Cane Church | Church | 16 | Colleton | 33 03 07 N | 080 29 29 W |
| Maple Cane School | School | 31 | Colleton | 33 01 51 N | 080 32 08 W |
| Maple Cane Swamp | Swamp | 13 | Colleton | 33 01 27 N | 080 27 12 W |
| Maple Church | Church | 13 | Horry | 33 54 49 N | 079 00 49 W |
| Maple Creek | Stream | | Greenville | 34 55 51 N | 082 09 19 W |
| Maple Crossroads | Populated Place | 14 | Horry | 33 54 49 N | 079 00 51 W |
| Maple Hill School (historical) | School | 262 | Spartanburg | 34 55 31 N | 082 11 19 W |
| Maple Park | Park | 43 | Florence | 34 11 41 N | 079 46 59 W |
| Maple Pond | Lake | 146 | Union | 34 48 58 N | 081 45 28 W |
| Maple Ridge (subdivision) | Populated Place | 12 | Berkeley | 32 59 34 N | 080 01 26 W |
| Maple Ridge Church | Church | 188 | Union | 34 42 26 N | 081 33 33 W |
| Maple Ridge School (historical) | School | 190 | Union | 34 42 23 N | 081 33 28 W |
| Maple Springs School (historical) | School | 293 | Anderson | 34 44 16 N | 082 32 51 W |
| Maple Swamp | Stream | | Dillon | 34 22 09 N | 079 21 13 W |
| Maple Swamp | Stream | | Horry | 33 53 14 N | 078 59 46 W |
| Maple Swamp | Swamp | 9 | Marion | 33 54 05 N | 079 22 11 W |
| Maplewood (subdivision) | Populated Place | 207 | Cherokee | 35 05 43 N | 081 37 08 W |
| Maplewood (subdivision) | Populated Place | 273 | Spartanburg | 34 55 00 N | 082 12 31 W |
| Maranatha Baptist Church | Church | 314 | Pickens | 34 51 20 N | 082 39 58 W |
| Marantha Christian School | School | 39 | Florence | 34 10 39 N | 079 49 27 W |
| Marbing School (historical) | School | 58 | Lee | 34 06 05 N | 080 19 14 W |
| Marburg School (historical) | School | 62 | Chesterfield | 34 40 33 N | 079 55 54 W |
| Marches Bridge | Bridge | 186 | Spartanburg | 34 47 18 N | 081 57 09 W |