| Country: | IND |
| Type: | NH |
| Route: | 233B |
| Map Notes: | Road map of India with National Highway 233B highlighted in solid blue color |
| Length Km: | 290 |
| Direction A: | West |
| Terminus A: | Siddharth Nagar, Uttar Pradesh |
| Destinations: | Siddharath Nagar Azamgarh, Mau, Gazipur, Chanduli, Mirzapur, Vikarampur, Sonbhadra, Bilaspur |
| Direction B: | East |
| Terminus B: | Bilaspur, Chhattisgarh |
| Previous Type: | NH |
| Previous Route: | 233A |
| Next Type: | NH |
| Next Route: | 234 |
National Highway 233B is a National Highway in India that links Bilaspur, Chhattisgarh to Siddharath Nagar in Uttar Pradesh.