Benton County is a county in the Northwest region of the U.S. state of Arkansas. Created as Arkansas' 35th county on September 30, 1836, Benton County contains thirteen incorporated municipalities, including Bentonville, the county seat, and Rogers, the most populous city. The county was named after Thomas Hart Benton, a U.S. Senator from Missouri influential in Arkansas statehood. The county is located within the Springfield Plateau of the Ozarks.