Benton County is organized with land from Pettis and Greene counties. It’s named after U.S. Senator Thomas Hart Benton, according to a Missouri Secretary of State history. Pictured is the Benton County Courthouse in Warsaw.
Photo credit: Kbh3rd via Wikimedia Commons https://en.wikipedia.org/wiki/Benton_County,_Missouri#/media/File:Benton_County_Missouri_Courthouse-20191026-6937.jpg