Karl Prantl (5 November 1923 – 8 October 2010) was an Austrian sculptor.

Prantl was born in Pöttsching in the Austrian state Burgenland.

He held his first international symposium (Symposion Europaischer Bildhauer) with 8 participants in the old quarry Römersteinbruch in Sankt Margarethen im Burgenland.

Prantl was invited to exhibit work in the Austrian Pavilion of the Venice Biennale in 1986.

Prantl died of a stroke at his home on 8 October 2010, a month before his 87th birthday.