John Harlan Willis (June 10, 1921 – February 28, 1945) was a United States Navy hospital corpsman who was killed in action during World War II while serving with a Marine Corps rifle company. He was posthumously awarded the nation's highest military decoration for valor, the Medal of Honor, for heroic actions "above and beyond the call of duty" on February 28, 1945, during the Battle of Iwo Jima.