Robert Mutter (December 20, 1873 – November 7, 1948) was an American farmer, businessman, and politician.
Born in the town of Dover, Racine County, Wisconsin, Mutter was a farmer and owned a hotel and saloon. Mutter served as sheriff of Racine County and on the Racine County Board. In 1919, Mutter served in the Wisconsin State Assembly. He was a Republican.
Mutter died in San Benito, Texas on November 7, 1948.