Pittsburg is a city in Crawford County, Kansas, United States, located in southeast Kansas near the Missouri state border. It is the most populous city in Crawford County and southeast Kansas. As of the 2020 census, the population of the city was 20,646. It is the home of Pittsburg State University.

Crawford County is a county located in Southeast Kansas. Its county seat is Girard, and its most populous city is Pittsburg. As of the 2020 census, the county population was 38,972. The county was named in honor of Samuel Crawford, the 3rd governor of Kansas. Pittsburg State University is located in Crawford County.