St Mark's Cathedral, Port Pirie, Roman Catholic cathedral in Port Pirie, Australia

St Mark's Cathedral is the Roman Catholic cathedral of Port Pirie, built to a design by C. Polain of Napperby and inaugurated on 9 July 1882. It was raised to cathedral rank in 1887, destroyed by fire on 21 October 1947, and reopened in its restored form in 1953.

The original building was constructed in 1882 but suffered severe fire damage in 1947. Following reconstruction, it reopened in 1953.

The cathedral is named for Saint Mark the Evangelist, whose feast day falls on 25 April. It serves as the seat of the Bishop of Port Pirie, a diocese covering northern South Australia, so the building hosts diocesan ceremonies as well as regular Masses.

The cathedral stands in Port Pirie, South Australia, and is the seat of the Diocese of Port Pirie. It was inaugurated on 9 July 1882 to a design by C. Polain of Napperby, was raised to cathedral status in 1887, and reopened in 1953 after a fire on 21 October 1947.

The cathedral serves as the seat of the Bishop for the Diocese of Port Pirie, which covers a large area across northern South Australia. This makes it an important religious center for a region much larger than the city itself.