John Allen Shauck (March 26, 1841 – January 3, 1918) 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 to Elah Shauck and Barbara (née Haldeman) Shauck. He 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.