Greensburg is a city in and the county seat of Kiowa County, Kansas, United States. As of the 2010 census, the city population was 777. Greensburg is also home to the world's largest hand-dug well.
In the evening of May 4, 2007, Greensburg was devastated by an EF5 tornado that traveled rapidly through the area, leveling at least 95 percent of the city and killing eleven people between the ages of 46 and 84.
Greensburg was named for D. R. "Cannonball" Green, who owned a stagecoach company and who helped to form the city.