| Country: | IND |
| Type: | NH |
| Route: | 19 |
| Map Custom: | yes |
| Length Km: | 240 |
| Direction A: | West |
| Terminus A: | Ghazipur, Uttar Pradesh |
| Direction B: | East |
| Terminus B: | Patna, Bihar |
| Destinations: | Ghazipur - Balia – Manjhi – Chhapra - Sonpur - Hajipur - Patna |
| States: | Bihar 120km (80miles) |
| Previous Type: | NH |
| Previous Route: | 18 |
| Next Type: | NH |
| Next Route: | 20 |
National Highway 19 or NH 19, (currently known as NH 31), is a National Highway in India that links Ghazipur in Uttar Pradesh with Patna in Bihar. This 240km (150miles)-long route passes through Ballia, Chhapra, Sonpur, Iduvoi, and Hajipur.
Of its total length 240km (150miles), the National Highway 19 traverses 120km (80miles) in Uttar Pradesh and the rest 120km (80miles) in Bihar.[1]