David G. Deininger (born July 9, 1947) is a retired Republican politician and jurist from Wisconsin. He served as a judge on the Wisconsin Court of Appeals for eleven years, from 1996 to 2007, and now serves as a reserve judge. He was the first chairman of the Wisconsin Government Accountability Board, appointed by Democratic Governor Jim Doyle. Earlier in his career, he served three and a half terms in the Wisconsin State Assembly, representing parts of Green and Rock counties, and was a Wisconsin Circuit Court Judge in Green County.