John Merrill

John Merrill may refer to:

• John Merrill (marathon walker), British sportsman
• John Merrill (Medal of Honor) (1843–1883), awarded the U.S. Medal of Honor, 1879
• John Merrill (American politician) (born 1963), American politician from Alabama
• John O. Merrill (1896–1975), American architect and structural engineer
• John P. Merrill (1917–1984), American physician, researcher and Harvard professor
• John C. Merrill, American professor
• John Merrill (MP) (died 1734), British government official and politician