The Ohio State Fair is one of the largest state fairs in the United States, held in Columbus, Ohio during late July through early August. As estimated in a 2011 economic impact study conducted by Saperstein & Associates; the State Fair contributes approximately 68.5 million dollars to the state's economy. In 2015, attendance was 982,305, the Fair's highest 12-day attendance on record.

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.