John Gretton

John Gretton is the name of the following people:

• John Gretton, 1st Baron Gretton (1867–1947), British sailor, businessman, and conservative politician
• John Gretton, 2nd Baron Gretton (1902–1982), British Conservative politician
• John Gretton, 3rd Baron Gretton (1941–1989), British peer
• John Gretton, 4th Baron Gretton (* 1975), British peer and Conservative politician

This is a disambiguation page for differentiating between several terms identified with the same word.