G
- Gary Allen (1936–1986), American journalist
- Gavin Allen (born 1965), former Australian rugby league footballer
- George Allen, several people
- GG Allin (1956–1993), American Punk Icon
- Gracie Allen (1895–1964), American comedienne
- Glover Morrill Allen (1879-1942), mammalogist
- Gordon P. Allen. American politician from North Carolina
- Graham Allen (footballer) (born 1977), English footballer
- Graham Allen (politician) (born 1953), UK Labour politician
- Grant Allen (1848–1899), Canadian science writer
- Gubby Allen (1902–1989), English cricketer
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