About 135,000 people.

Dayton is a city in southwest Ohio famous as the home of the Wright brothers, who invented the airplane. It is a proud city of flight and invention.
You can see real airplanes and rockets at the huge National Museum of the U.S. Air Force, or explore where the Wright brothers dreamed up flight.
The Wright brothers built and tested their first airplanes in Dayton, making it the birthplace of aviation.
The National Museum of the U.S. Air Force is free and packed with jets, bombers, and even spacecraft to walk around.