Kansas State Fair is a state fair held annually in Hutchinson, Kansas, United States. It starts the Friday following Labor Day in September, and lasts for 10 days. This fair is the largest single event in the state and attracts approximately 350,000 people annually. The fairgrounds is centered at 23rd Ave between Main and Plum Street in Hutchinson, and consists of over 70 buildings on 280 acres (110 ha). It has full-time year-round staff. The 2023 Fair will be held from September 8 to 17.

A state fair is an annual competitive and recreational gathering of a U.S. state's population, usually held in late summer or early fall. It is a larger version of a county fair, often including only exhibits or competitors that have won in their categories at the more-local county fairs.