Pittsburg -- U.S. County in Oklahoma Population (2000): 43953 Housing Units (2000): 21520 Land area (2000): 1305.940807 sq. miles (3382.371018 sq. km) Water area (2000): 71.905593 sq. miles (186.234622 sq. km) Total area (2000): 1377.846400 sq. miles (3568.605640 sq. km) Located within: Oklahoma (OK), FIPS 40 Location: 34.939711 N, 95.714300 W Headwords: Pittsburg Pittsburg, OK Pittsburg County Pittsburg County, OK