Feature Name | Class | Elev. meters | County | Latitude DMS | Longitude DMS |
| Long Branch Church | Church | 109 | Sumter | 33 59 42 N | 080 29 50 W |
| Long Branch Church | Church | 12 | Williamsburg | 33 27 20 N | 079 37 29 W |
| Long Branch Church | Church | 23 | Williamsburg | 33 35 09 N | 080 02 32 W |
| Long Branch Church (historical) | Church | 295 | Pickens | 34 44 36 N | 082 50 04 W |
| Long Branch Estates | Populated Place | 7 | Charleston | 32 47 52 N | 080 03 14 W |
| Long Branch of Island Creek | Stream | | Cherokee | 35 06 53 N | 081 48 21 W |
| Long Branch School (historical) | School | 237 | Anderson | 34 26 39 N | 082 32 47 W |
| Long Branch School (historical) | School | 91 | Barnwell | 33 14 58 N | 081 38 47 W |
| Long Branch School (historical) | School | 83 | Barnwell | 33 19 09 N | 081 23 18 W |
| Long Branch School (historical) | School | 177 | Edgefield | 33 48 16 N | 081 43 54 W |
| Long Branch School (historical) | School | 34 | Florence | 34 05 10 N | 079 50 50 W |
| Long Branch School (historical) | School | 20 | Hampton | 32 36 06 N | 081 13 33 W |
| Long Branch School (historical) | School | 232 | Laurens | 34 34 02 N | 082 05 04 W |
| Long Branch School (historical) | School | 202 | Laurens | 34 31 00 N | 081 54 07 W |
| Long Branch School (historical) | School | 79 | Lexington | 33 57 25 N | 081 06 52 W |
| Long Branch School (historical) | School | 295 | Pickens | 34 44 35 N | 082 50 03 W |
| Long Branch Swamp | Swamp | 18 | Horry | 34 07 52 N | 079 01 22 W |
| Long Cane (historical) | Populated Place | 140 | Abbeville | 34 08 54 N | 082 19 56 W |
| Long Cane Academy | School | 146 | McCormick | 33 55 25 N | 082 17 04 W |
| Long Cane Bridge | Bridge | 100 | McCormick | 33 57 42 N | 082 23 29 W |
| Long Cane Cemetery | Cemetery | 150 | Abbeville | 34 07 23 N | 082 19 16 W |
| Long Cane Church | Church | 128 | McCormick | 34 00 58 N | 082 20 56 W |
| Long Cane Creek | Stream | | McCormick | 33 58 33 N | 082 22 06 W |
| Long Cane Creek Boat Ramp | Locale | 100 | McCormick | 33 56 04 N | 082 23 33 W |
| Long Cane Creek Picnic Area | Park | 103 | McCormick | 33 56 00 N | 082 23 27 W |
| Long Cane Ranger District Office | Building | 202 | Greenwood | 34 11 29 N | 082 09 40 W |
| Long Cane Scenic Area | Park | 135 | Abbeville | 34 07 00 N | 082 19 15 W |
| Long Cane School | School | 153 | Abbeville | 34 07 19 N | 082 19 06 W |
| Long Cane School | School | 189 | Abbeville | 34 13 20 N | 082 19 40 W |
| Long Cane School (historical) | School | 137 | Edgefield | 33 54 28 N | 081 53 28 W |
| Long Cove Plantation | Populated Place | 3 | Beaufort | 32 10 21 N | 080 44 42 W |
| Long Crane Creek Campground | Locale | 122 | McCormick | 33 56 01 N | 082 22 39 W |
| Long Creek | Stream | | Charleston | 32 36 26 N | 080 17 44 W |
| Long Creek | Stream | | Charleston | 32 49 58 N | 079 45 18 W |
| Long Creek | Stream | | Charleston | 33 02 13 N | 079 31 40 W |
| Long Creek | Stream | | Lexington | 33 56 41 N | 081 19 54 W |
| Long Creek | Stream | | Oconee | 34 47 08 N | 083 19 27 W |
| Long Creek Academy | School | 520 | Oconee | 34 47 23 N | 083 14 47 W |
| Long Creek Landing | Populated Place | 7 | Colleton | 32 56 08 N | 080 24 10 W |
| Long Creek Lookout Tower | Tower | 658 | Oconee | 34 48 18 N | 083 14 17 W |
| Long Creek School (historical) | School | 530 | Oconee | 34 48 53 N | 083 08 60 W |
| Long Field Pond | Reservoir | 5 | Berkeley | 33 01 25 N | 079 59 35 W |
| Long Gall Branch | Stream | | Bamberg | 33 16 59 N | 081 10 41 W |
| Long Hall | Building | 226 | Pickens | 34 40 41 N | 082 50 05 W |
| Long Hill | Summit | 7 | Jasper | 32 24 36 N | 081 09 22 W |
| Long Hill | Summit | 184 | York | 34 53 31 N | 081 14 22 W |
| Long Island | Island | 3 | Beaufort | 32 08 52 N | 080 54 51 W |
| Long Island | Island | 3 | Beaufort | 32 31 07 N | 080 47 26 W |
| Long Island | Island | 3 | Beaufort | 32 08 54 N | 080 47 56 W |
| Long Island | Island | 2 | Charleston | 32 34 55 N | 080 09 04 W |
| Long Island | Island | 2 | Charleston | 32 41 04 N | 079 55 50 W |
| Long Island (historical) | Island | 173 | York | 35 02 27 N | 081 02 33 W |
| Long Junior High School | School | 54 | Chesterfield | 34 41 52 N | 079 54 22 W |
| Long Lake | Lake | 9 | Marion | 34 00 11 N | 079 29 14 W |
| Long Lands Plantation | Locale | 23 | Williamsburg | 33 30 60 N | 079 56 32 W |
| Long Lane | Locale | 133 | Newberry | 34 23 46 N | 081 34 34 W |
| Long Lane Branch School (historical) | School | 134 | Newberry | 34 23 47 N | 081 34 31 W |
| Long Lane Hunt Camp | Locale | 142 | Newberry | 34 23 37 N | 081 35 32 W |
| Long Lane Lookout Tower | Tower | 147 | Newberry | 34 23 40 N | 081 35 30 W |
| Long Lane School (historical) | School | 138 | Newberry | 34 23 40 N | 081 34 49 W |
| Long Lick Branch | Stream | | Laurens | 34 19 59 N | 082 05 14 W |
| Long Meadows | Populated Place | 242 | Anderson | 34 32 00 N | 082 36 24 W |
| Long Mountain | Summit | 623 | Oconee | 34 48 43 N | 083 13 57 W |
| Long Mountain | Summit | 610 | Oconee | 34 52 51 N | 083 05 55 W |
| Long Mountain | Summit | 481 | Pickens | 34 56 52 N | 082 39 00 W |
| Long Mountain Church | Church | 512 | Oconee | 34 46 43 N | 083 15 18 W |
| Long Mountain Lookout Tower | Tower | 610 | Oconee | 34 52 51 N | 083 05 55 W |
| Long Mountain Lookout Tower | Tower | 618 | Oconee | 34 52 51 N | 083 05 56 W |
| Long Point | Cape | 3 | Beaufort | 32 27 40 N | 080 36 04 W |
| Long Point | Cape | 3 | Beaufort | 32 31 06 N | 080 47 29 W |
| Long Point | Populated Place | 34 | Horry | 34 01 29 N | 078 52 49 W |
| Long Point Baptist Church | Church | 8 | Charleston | 32 50 41 N | 079 50 06 W |
| Long Point School (historical) | School | 8 | Charleston | 32 50 20 N | 079 51 56 W |
| Long Pond | Lake | 16 | Hampton | 32 41 48 N | 081 22 07 W |
| Long Pond | Lake | 7 | Horry | 33 47 05 N | 078 45 15 W |
| Long Pond | Reservoir | 140 | Edgefield | 33 44 33 N | 081 48 01 W |
| Long Pond | Reservoir | 181 | Lexington | 33 55 39 N | 081 27 42 W |
| Long Pond | Swamp | 56 | Bamberg | 33 12 42 N | 081 07 38 W |
| Long Pond Dam D-3414 | Dam | 223 | Cherokee | 35 00 30 N | 081 37 41 W |
| Long Pond Savannah | Swamp | 11 | Berkeley | 33 03 15 N | 079 49 30 W |
| Long Ridge | Populated Place | 19 | Berkeley | 33 08 33 N | 080 09 39 W |
| Long Ridge | Ridge | 21 | Berkeley | 33 09 29 N | 080 08 35 W |
| Long Ridge | Ridge | 435 | Pickens | 34 55 53 N | 082 51 14 W |
| Long Ridge School (historical) | School | 22 | Berkeley | 33 08 59 N | 080 08 38 W |
| Long Sand Ridge | Ridge | 13 | Horry | 34 07 43 N | 079 11 38 W |
| Long School | School | 12 | Horry | 33 55 33 N | 078 45 06 W |
| Long Swamp | Stream | | Horry | 33 54 33 N | 079 02 02 W |
| Longbrow Plantation | Locale | 3 | Colleton | 32 37 54 N | 080 38 26 W |
| Longcreek | Populated Place | 495 | Oconee | 34 46 24 N | 083 15 33 W |
| Longcreek | Populated Place | 282 | Pickens | 34 50 29 N | 082 32 52 W |
| Longlands Hope Swamp Pond | Reservoir | 21 | Williamsburg | 33 31 43 N | 079 59 23 W |
| Longlands House Pond | Reservoir | 18 | Williamsburg | 33 30 19 N | 079 56 59 W |
| Longleaf | Populated Place | 11 | Horry | 33 37 14 N | 078 59 24 W |
| Longleaf (subdivision) | Populated Place | 36 | Florence | 34 09 18 N | 079 46 48 W |
| Longnose Creek | Stream | | Oconee | 34 38 24 N | 083 15 12 W |
| Longnose Mountain | Summit | 531 | Oconee | 34 42 00 N | 083 15 51 W |
| Longs | Populated Place | 10 | Horry | 33 56 19 N | 078 43 59 W |
| Longs Chapel | Church | 202 | Union | 34 49 07 N | 081 40 14 W |
| Longs Pond | Reservoir | 102 | Lexington | 33 54 60 N | 081 17 34 W |
| Longs School (historical) | School | 105 | Richland | 34 07 11 N | 080 56 47 W |
| Longshore | Populated Place | 165 | Newberry | 34 16 27 N | 081 44 46 W |
| Longshore Number One D-1468 Dam | Dam | 157 | Newberry | 34 15 42 N | 081 45 47 W |
| Longshore Number Two D-1469 Dam | Dam | 156 | Newberry | 34 16 00 N | 081 45 41 W |
| Longstreet Annex | Building | 92 | Richland | 33 59 44 N | 081 01 44 W |
| Longstreet Theatre | Building | 92 | Richland | 33 59 46 N | 081 01 45 W |
| Longtown | Populated Place | 164 | Fairfield | 34 20 52 N | 080 50 14 W |
| Longtown Cemetery | Cemetery | 175 | Fairfield | 34 21 26 N | 080 51 07 W |
| Longtown Church | Church | 176 | Fairfield | 34 21 27 N | 080 51 07 W |
| Longview Plant | Populated Place | 116 | Lexington | 34 01 08 N | 081 23 24 W |
| Longwater Swamp | Swamp | 3 | Georgetown | 33 27 08 N | 079 13 47 W |