Colonel John Simon Loisel (May 21, 1920 – January 20, 2010) was an American air ace, credited with having shot down 11 Japanese aircraft during World War II. Loisel was born in Coeur d'Alene, Idaho and joined the United States Army Air Forces in 1941. By age 25, Loisel had spent more time in combat than any other American pilot in World War II, with over three years in the Pacific. Serving in the Pacific he quickly distinguished himself by first becoming an ace after achieving five kills in just a two-month period, and then becoming a double ace.