Warrick County is a county located in the U.S. state of Indiana. As of 2020, the population was 63,898. The county seat is Boonville. It was organized in 1813 and was named for Captain Jacob Warrick, an Indiana militia company commander killed in the Battle of Tippecanoe in 1811. It is one of the ten fastest-growing counties in Indiana.

Boonville is a city in Boon Township, Warrick County, Indiana, United States. The population was 6,246 at the 2010 census. The city is the county seat of Warrick County.