John Knight Waters (December 20, 1906 – January 9, 1989) was a United States Army four-star general who served as commander, U.S. Army, Pacific from 1964 to 1966. He was also the son-in-law of General George S. Patton. During World War II, he was taken prisoner while fighting in Tunisia in 1943, leading Patton to set up the controversial Task Force Baum to break him out.