匹兹堡县（Pittsburg County, Oklahoma）是美国奥克拉荷马州东南部的一个县。面积3,569平方公里。根据美国2000年人口普查，共有人口43,953人。县治麦卡莱斯特 (McAlester)。

成立于1907年11月16日。县名来自宾夕法尼亚州的匹兹堡 (Pittsburgh)。

Pittsburg County is a county located in the U.S. state of Oklahoma. As of the 2010 census, the population was 45,837. Its county seat is McAlester. The county was formed from part of the Choctaw Nation in Indian Territory in 1907. County leaders believed that its coal production compared favorably with Pittsburgh, Pennsylvania at the time of statehood.