Pettis County is located in west-central Missouri, United States. It was established in 1835 and is named after a local pioneer, Benjamin Pettis. The county seat is Sedalia, which is known for its rich history and cultural events, including the annual Missouri State Fair. The county covers an area of approximately 676 square miles and features a mix of rural landscapes and small towns. It is part of the Sedalia Micropolitan Statistical Area and has a population of around 40,000 residents. The economy is diverse, with agriculture, manufacturing, and services playing significant roles.