Donald Allen Bailey (July 21, 1945 – March 9, 2020) was an American lawyer and politician from Pennsylvania. He was a Democratic member of the United States House of Representatives from 1979 to 1983, Auditor General of Pennsylvania from 1985 to 1989, and a candidate for the Democratic nomination for United States Senate and Governor of Pennsylvania. His Congressional District (PA-21) included all of Westmoreland County, Pennsylvania with a sliver of Allegheny County, Pennsylvania, prior to the 1981 redistricting.