Otto Weidinger (27 May 1914 – 10 January 1990) was a member of the Waffen-SS in Nazi Germany and a regimental commander in the SS Division Das Reich during World War II. In this capacity, he was involved in the Oradour massacre in France in June 1944. He was the author of a revisionist account of the division's history, produced under the auspices of HIAG, a Waffen-SS lobby group in post-war West Germany.