Leopold "Leo" Windtner (born 30 August 30, 1950 in Linz, Upper Austria) is general manager of Energie AG Oberösterreich and honorary president of the Austrian Football Association (German: Österreichischer Fußball-Bund, ÖFB).
Windtner graduated from the Handelsakademie Linz (business academy in Linz) and subsequently completed studies on world trade at the Vienna University of Economics and Business, where he graduated with a PhD in 1977. In 1978, he started at the Oberösterreichische Kraftwerke AG (OKA), known today as the Energie AG Oberösterreich; in 1985 he was appointed head of department and 1994 was appointed Chief Executive Officer and General Manager. His contract was extended in June 2009 for another five years until October 31, 2014.
From 1989 to 1996, he was President of the Sportunion Oberösterreich, then until 2009, was President of the Upper Austrian Football Association. In 1999, he was vice-president of the ÖFB and after the resignation of Friedrich Stickler on 7 November 2008, Windtner was elected, through a majority voting against Günter Kaltenbrunner in February 2009, to ÖFB president.
Windtner committed himself politically in the municipality of Sankt Florian and was deputy mayor from 1979 to 1985, and mayor from 1985 to 1995. Since 1996 he has been chairman of the Sankt Florian boys' choir.
Windtner is married and has three daughters. He lives in Sankt Florian near Linz.