Benton County is a county located in the west central part of the U.S. state of Missouri. The population was 19,394 as of the 2020 Census. Its county seat is Warsaw. The county was organized January 3, 1835, and named for U.S. Senator Thomas Hart Benton of Missouri.

Warsaw is a city located in Benton County, Missouri, United States. The population was 2,209 at the 2020 census. Warsaw is the county seat of Benton County.