| Country: | VNM |
| Type: | QL |
| Route: | 1C |
| Length Km: | 17.3 |
| Direction A: | West |
| Terminus A: | at Thanh junction, Diên Khánh, Nha Trang |
| Direction B: | East |
| Terminus B: | at Rù Rì Pass in Vĩnh Lương, Nha Trang |
| Previous Type: | QL |
| Previous Route: | 1B |
| Next Type: | QL |
| Next Route: | 1D |
National Route 1C is a 17.3 km long road running west–east in Khanh Hoa province, starting at the Ri Ri Pass in Vinh Luong Commune, Nha Trang City, and ending at Thanh T-junction, Dien town, Dien Khanh district.[1] Route 1C was the main route of Route 1A before it was rerouted to bypass Nha Trang.