Donora is a borough in Washington County, Pennsylvania, United States, approximately 20 miles south of Pittsburgh along the Monongahela River. The population was 4,558 as of the 2020 census. Donora was incorporated in 1901. It takes its name from a portmanteau of William Donner and Nora Mellon, wife of banker Andrew W. Mellon. The boro…Donora is a borough in Washington County, Pennsylvania, United States, approximately 20 miles south of Pittsburgh along the Monongahela River. The population was 4,558 as of the 2020 census. Donora was incorporated in 1901. It takes its name from a portmanteau of William Donner and Nora Mellon, wife of banker Andrew W. Mellon. The borough's nickname is "The Home of Champions", mainly because of the large number of famous athletes who have called Donora their home, including Baseball Hall of Fame outfielders Stan Musial and Ken Griffey Jr.