The Arena District is a mixed-use planned development and neighborhood in Columbus, Ohio. The site was developed through a partnership between Nationwide Realty Investors, Ltd., the City of Columbus and private investors. Interpretation of the boundaries of the district are evolving as the neighboring blocks around the original 75-acre (300,000 m2) site have seen additional commercial and residential development. The Arena District is named for Nationwide Arena.

Columbus is the capital and most populous city of the U.S. state of Ohio. With a 2020 census population of 905,748, it is the 14th-most populous city in the U.S., the second-most populous city in the Midwest after Chicago, and the third-most populous U.S. state capital after Phoenix, Arizona and Austin, Texas. Columbus is the seat of government of Franklin County; it also extends into Delaware and Fairfield counties. It is the core city of the Columbus metropolitan area, which encompasses ten counties in central Ohio. It had a population of 2,138,926 in 2020, making it the largest metropolitan area entirely in Ohio and 32nd-largest metro area in the U.S.