The Roman Catholic Diocese of Altoona–Johnstown (Latin: Dioecesis Altunensis-Johnstoniensis) is a Roman Catholic diocese in Pennsylvania.

It was established on May 30, 1901, as the Diocese of Altoona.
On October 9, 1957, the name was changed to the Diocese of Altoona-Johnstown.

It consists of Bedford, Blair, Cambria, Centre, Clinton, Fulton, Huntingdon and Somerset Counties.

The diocese also sponsors Proclaim!,
a weekly Catholic news show, and a weekly live mass from St. John Gualbert Cathedral in Johnstown.

The seat of the bishop is in the Cathedral of the Blessed Sacrament.
The Roman Catholic Diocese of Altoona–Johnstown (Latin: Dioecesis Altunensis-Johnstoniensis) is a Roman Catholic diocese in Pennsylvania.
It was established on May 30, 1901, as the Diocese of Altoona. On October 9, 1957, the name was changed to the Diocese of Altoona-Johnstown.
It consists of Bedford, Blair, Cambria, Centre, Clinton, Fulton, Huntingdon and Somerset Counties.
The diocese also sponsors Proclaim!, a weekly Catholic news show, and a weekly live mass from St. John Gualbert Cathedral in Johnstown.
The seat of the bishop is in the Cathedral of the Blessed Sacrament.
Roman Catholic Diocese of Altoona–Johnstown