Peter Wiesinger (15 May 1938 – 23 June 2023) was an Austrian philologist who specialized in Germanic studies.

Peter Wiesinger was born in Vienna, Austria on 15 May 1938.

Wiesinger habilitated at Marburg in 1969 and was appointed a professor there in 1971.

From 1972 to 2006, Wiesinger was Professor of German Language and Old German Literature at the University of Vienna, succeeding Eberhard Kranzmayer.

Wiesinger died on 23 June 2023, at the age of 85.