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 -long route passes through Ballia, Chhapra, Sonpur, Iduvoi, and Hajipur.
Of its total length , the National Highway 19 traverses in Uttar Pradesh and the rest in Bihar.