Glenn may refer to:
Name or surname Glenn (name), including a list of people with the given name or surname
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 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)