Great American Ball Park is a baseball stadium in Cincinnati, Ohio. It serves as the ballpark of Major League Baseball's Cincinnati Reds, and opened on March 31, 2003, replacing Cinergy Field, the Reds' former ballpark from 1970 to 2002. Great American Insurance bought the naming rights to the new stadium at US$75 million for 30 years.

Cincinnati is a city in and the county seat of Hamilton County, Ohio, United States. Settled in 1788, the city is located in the northern side of the confluence of the Licking and Ohio rivers, the latter of which marks the state line with Kentucky. The population of Cincinnati was 309,317 in 2020, making it the third-most populous city in Ohio after Columbus and Cleveland, and 65th in the United States. The city is the economic and cultural hub of the Cincinnati metropolitan area, Ohio's most populous metro area and the nation's 30th-largest with over 2.265 million residents.