Fairborn is a city in Greene County, Ohio, United States, near Dayton and Wright-Patterson Air Force Base. The population was 32,770 at the 2010 census. It is the only city in the world with the name of Fairborn, a portmanteau word created from the names Fairfield and Osborn, the two villages that merged in 1950 after the Great Dayton Flood of 1913 forced Osborn to move out of a flood plain and alongside Fairfield.
Fairborn is part of the Dayton Metropolitan Statistical Area.
Fairborn is the home of Wright State University, which serves nearly 20,000 undergraduate and graduate students. The city is also home to the disaster training facility known as Calamityville.