Live Chat I-26 Community Nearby Traffic US 21 SC 2024-05-27 Roadnow Weather | Gas | Restaurants | Hotels | Car Repair | Convenience Stores Cities close to US 21 SC West Columbia, SC 8.04 Swansea, SC 10.82 Cayce, SC 15.14 Interstate highway exits close to US 21 SC Exit 119, i26 7.56 Exit 125, i26 8.18 Exit 1, i77 10.97 Interstate highways close to US 21 SC i26 map 6.47 i77 map 10.97 i20 map 19.01 State roads close to US 21 SC US 321 SC map 0.17 US 21 SC map 7.21 SC 6 map 7.80