John Allen Shauck was a Republican politician in the U.S. State of Ohio who was an Ohio Supreme Court Judge 1895–1914.
John Allen Shauck was born on a farm near Johnsville, Morrow County, Ohio and attended private and public schools there.
In 1864 he graduated from Otterbein University and entered 100 days service in the 136th Ohio Infantry during the American Civil War. In 1867 he graduated from the University of Michigan Law School.
He moved to Kansas City, Kansas for a year, then returned to Ohio, establishing a practice in Dayton in 1868. Shauck continued a private practice until 1884, when he was elected as a Republican to the Circuit Court Judgeship of the Second Circuit. He was re-elected in 1889.
At the 1894 State Republican Convention, Shauck defeated James Latimer Price and incumbent Franklin J. Dickman for the nomination, and Democrat James D. Ermston in the General election for State Supreme Court Justice. He remained on the court until the end of 1914. Starting in 1900, he was professor of law at The Ohio State University, and was president of the Ohio State Bar Association in 1917.
He died January 3, 1918 at Columbus. Shauck married Ada May Phillips on June 1, 1876 in Centralia, Illinois. They had two children.