BOONVILLE, a city in the coal-mining and agricultural region of south-western Indiana, U.S.A., on Cypress creek, 17m. north-east of Evansville ; the county seat of Warrick county. It is served by the Evansville Suburban and Newburgh and the Southern railways. The population in 1920 was 4,451; in 193o it was 4,208. Boonville was founded about 1818 and incorporated in 1858.