Gorakhpur (gōˈrəkpŏrˌ) [key], city (1991 pop. 505,566), Uttar Pradesh state, N central India, on the Rapti River. Founded c.1400, it is an agricultural market and industrial center, with textile factories, sugar mills, and railway workshops. There is an airport in Gorakhpur. The city was badly damaged by an earthquake in 1934, but has since been rebuilt.