Glenn may refer to: Name or surname Glenn (name) John Glenn, U.S. astronaut Cultivars Glenn (mango) a 6-row barley variety Places In the United States: Glenn, California Glenn County, California Glenn, Georgia, a settlement in Heard County Glenn, Illinois Glenn, Michigan Glenn, Missouri University, Orange County, North Carolina, formerly called Glenn Glenn Highway in Alaska Organizations Glenn Research Center, a NASA center in Cleveland, Ohio See also New Glenn, a heavy-lift orbital launch vehicle Glen, a valley Glen (disambiguation)