# U.S. Route 15 in South Carolina

U.S. Highway 15 (US 15) is a 158.832-mile (255.615 km) United States Numbered Highway in the eastern part of the U.S. state of South Carolina. It is a north–south highway that travels from Walterboro to the North Carolina state line, north-northeast of McColl.

## Route description

Starting at US 17 Alternate (US 17 Alt.) in Walterboro US 15 runs north as North Jefferies Boulevard, which was previously designated as US 17 Alt. until that route turned east onto Wichman Street. It runs parallel to Interstate 95 (I-95) intersecting with US 78 in St. George and later one of its auxiliary routes US 178 before it crosses I-26 at a cloverleaf interchange (exit 172) in Harleyville. Then it turns northwest, passing through Wells where it not only intersects US 176, but the western terminus of South Carolina Highway 45. North of that point it crosses I-95 at exit 93. Just before the town of Santee US 15 converges with US 301. As the routes turn east, the roadway continues north as US 15 Connector to service Santee. In Santee, the two highways merge with I-95 at exit 98 and all three cross Lake Marion. At exit 102, US 15/US 301 split off from I-95 returning to the former segment of US 15/US 301, now named St. Paul Road and go into the town of Summerton. US 15 then separates from US 301, remaining on Church Street (while US 301 makes a right turn onto Main Street) and heads mainly north to city of Sumter. From there, it continues north, crosses I-20, and goes through the cities of Bishopville and Hartsville to the town of Society Hill. It is here that US 401 joins US 15 and both go to the North Carolina border.

## History

US 15 was extended south into South Carolina in 1935 as a replacement for the second incarnation of US 401 that existed between 1932 and 1934, which also existed in North Carolina. Besides being replaced by US 15, part of that route was also replaced by the former US 15 Alt. between Sumter and Society Hill.
In 1946 the road ran along a new two-lane bridge over Lake Marion along with US 301 with the potential for a second span that was never built. For a brief period from 1950 to 1951, US 15 was extended south from Walterboro through Yemassee and into Pocotaligo along what is today part of US 17 Alt.
When I-95 was built across Lake Marion in 1968, US 15 and US 301 ran parallel to it until they were relocated in a triple concurrency in 1987.

### South Carolina Highway 42

South Carolina Highway 42 (SC 42) was an original state highway that was established in 1922 from Sumter to Bishopville. In 1925 or 1926, it was decommissioned and redesignated as SC 30. Today, most of its path is part of US 15.

## Major intersections

| County | Location | mi | km | Destinations | Notes |
| Colleton | Walterboro | 0.000 | 0.000 | US 17 Alt. (North Jefferies Boulevard / Wichman Street) to I-95 – Savannah, Summerville, Charleston, Colleton Museum, Artisans Center | Southern terminus |
| Colleton | Walterboro | 0.170 | 0.274 | SC 64 Bus. east (Paul Street) – Jacksonboro | Southern end of SC 64 Bus. concurrency |
| Colleton | Walterboro | 0.570 | 0.917 | SC 64 Bus. west to I-95 – Ehrhardt | Northern end of SC 64 Bus. concurrency |
| Colleton | Walterboro | 1.200 | 1.931 | SC 64 to I-95 | Provides access to Colleton Medical Center and Lowcountry Regional Airport |
| Colleton | Canadys | 11.160 | 17.960 | SC 61 – Summerville, Branchville | |
| Dorchester | St. George | 20.820 | 33.507 | US 78 – Dorchester, Branchville | |
| Dorchester | Rosinville | 26.650 | 42.889 | US 178 – Bowman, Harleyville | |
| Dorchester | Rosinville | 29.148– 29.150 | 46.909– 46.912 | I-26 – Orangeburg, Summerville | I-26 exits 172 A-B |
| Orangeburg | ​ | 32.650 | 52.545 | Bunch Ford Road east (SC 314 east) | Western terminus of SC 314 and Bunch Ford Road |
| Orangeburg | Wells | 36.620 | 58.934 | US 176 / SC 45 east – Cameron, Eutawville | Western terminus of SC 45 |
| Orangeburg | ​ | 39.690 | 63.875 | I-95 – Savannah, Florence | I-95 exit 93 |
| Orangeburg | ​ | 43.620 | 70.200 | US 301 south / Bass Drive north (US 15 Conn. north) – Orangeburg, Santee, Santee State Park | Southern end of US 301 concurrency; southern terminus of US 15 Conn.; SCHP Patrolman Harry B. Ray Memorial Intersection |
| Orangeburg | ​ | 44.608– 44.668 | 71.790– 71.886 | I-95 south / Five Chop Road (SC 6 Conn. east) – Savannah | Southern end of I-95 concurrency; western terminus of SC 6 Conn. and Five Chop Road; I-95 exit 97 |
| US 15 overlaps with I-95 (exits 97–102) ||||||
| Clarendon | Adams Landing | 50.312 | 80.969 | I-95 north – Florence | Northern end of I-95 concurrency; I-95 exit 102 |
| Clarendon | Summerton | 57.712 | 92.878 | US 301 north – Manning | Northern end of US 301 concurrency |
| Clarendon | Summerton | 57.772 | 92.975 | Railroad Avenue | Northern terminus of US 15 Conn.; western terminus of Railroad Avenue |
| Clarendon | Paxville | 67.122 | 108.022 | SC 261 – Pinewood, Manning | |
| Sumter | South Sumter–Sumter line | 77.552 | 124.808 | US 15 Conn. north | No access from US 15 to US 15 Conn. or from US 15 Conn. to US 15 north |
| Sumter | South Sumter–Sumter line | 77.822 | 125.242 | US 521 south (South Guignard Parkway) – Manning, Camden, Central Carolina Technical College, University of South Carolina Sumter | |
| Sumter | Sumter | 80.582 | 129.684 | US 76 Bus. – Camden | |
| Sumter | Sumter | 80.842 | 130.103 | US 401 north – Lamar, Darlington | Southern terminus of US 401 |
| Sumter | Sumter | 82.412 | 132.629 | US 76 / US 378 – Columbia, Lynchburg, Turbeville | |
| Lee | Manville | 96.902 | 155.949 | SC 441 south – Woodrow | Northern terminus of SC 441 |
| Lee | Bishopville | 100.582 | 161.871 | I-20 – Columbia, Florence | I-20 exit 116 |
| Lee | Bishopville | 102.172 | 164.430 | SC 154 – Dorchester | |
| Lee | Bishopville | 103.042 | 165.830 | SC 34 / SC 341 – Camden, Lynchburg | Southern end of SC 34 and SC 341 concurrencies |
| Lee | Bishopville | 104.432 | 168.067 | SC 341 north – Bethune | Northern end of SC 341 concurrency |
| Darlington | Lydia | 114.392 | 184.096 | SC 34 east / SC 403 south – Darlington, Timmonsville | Northern end of SC 34 concurrency; southern end of SC 403 concurrency |
| Darlington | Hartsville | 117.302 | 188.779 | SC 151 – McBee, Darlington | |
| Darlington | Hartsville | 117.972 | 189.858 | US 15 Bus. north – Hartsville | Southern terminus of US 15 Bus. |
| Darlington | Hartsville | 118.942– 118.966 | 191.419– 191.457 | SC 151 Bus. – Hartsville, Darlington | Interchange |
| Darlington | Hartsville | 123.092 | 198.097 | US 15 Bus. south – Hartsville | Northern terminus of US 15 Bus. |
| Darlington | Society Hill | 133.602 | 215.012 | US 52 south / US 401 south – Darlington | Southern end of US 52/US 401 concurrency |
| Darlington | Society Hill | 135.682 | 218.359 | US 52 north – Cheraw | Northern end of US 52 concurrency |
| Marlboro | Dyers Hill | 142.862 | 229.914 | SC 912 north – Wallace | Southern terminus of SC 912 |
| Marlboro | Bennettsville | 145.972 | 234.919 | SC 385 (West Main Street) – Bennettsville | Former US 15 Bus. |
| Marlboro | Bennettsville | 147.202 | 236.899 | SC 9 south / SC 38 west – Cheraw | Southern end of SC 9 and SC 38 concurrencies |
| Marlboro | Bennettsville | 148.132 | 238.395 | SC 9 Bus. north / SC 38 Bus. west / SC 38 east – Marion, Myrtle Beach | Northern end of SC 38 concurrency; southern terminus of SC 9 Bus.; eastern terminus of SC 38 Bus. |
| Marlboro | Bennettsville | 149.172 | 240.069 | SC 9 south – North Myrtle Beach, Dillon | Northern end of SC 9 concurrency |
| Marlboro | McColl | 157.172 | 252.944 | SC 381 – Clio, Gibson, North Carolina | |
| Marlboro | McColl | 158.832 | 255.615 | US 15 north / US 401 north – Laurinburg | Continuation into North Carolina |
| 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Concurrency terminus Incomplete access ||||||