Otto Leopold Stuppacher (3 March 1947 – 13 August 2001)[1][2] was a racing driver from Vienna, Austria.

He was refused entry to the 1976 Austrian Grand Prix, along with teammate Karl Oppitzhauser, despite trying to raise a petition from the other teams.

At the 1976 Italian Grand Prix he failed to qualify by a considerable margin, but subsequently he was promoted up the order when three other cars had their times disallowed due to fuel irregularities.

The three demoted runners were eventually re-admitted after the withdrawal of Stuppacher, Arturo Merzario, and Guy Edwards.

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