Ignatius Klotz, Sr. (November 25, 1843 – February 20, 1911) was an American farmer and politician
Born in Innsbruck, Austrian Empire, Klotz received a common school education. In 1848, he emigrated to the United States and settled in the town of Eden in Fond du Lac County, Wisconsin. In 1889, Klotz moved to Campbellsport, Wisconsin. Klotz was a farmer.