Apr 202009
Founded on 30 May 1901 as the diocese of Altoona. Name changed to the diocese of Altoona-Johnstown on 9 October 1957. Suffragan of the archdiocese of Philadelphia. Notable bishops include
- Bishop Eugene Augustine Garvey
- Bishop Howard Joseph Carroll
- Bishop James John Hogan
- Bishop John Joseph McCort
- Bishop Joseph Carroll McCormick
- Bishop Joseph Victor Adamec
- Bishop Richard Thomas Guilfoyle
See also