John Harrington or John Harington may refer to:

• John Harrington (hockey player), American Olympic hockey player who was involved in the 1980 Winter Olympics' famed "Miracle on Ice"
• John Harrington (Red Sox CEO)
• John Peabody Harrington, United States ethnologist and Native American specialist
• John Harrington (investor) - Social venture capitalist
• John Harrington (photographer, author) Washington D.C. photographer
• John Harrington (Medal of Honor), American Indian Wars soldier and Medal of Honor recipient
• John Harrington, Orthopedic Surgeon, William Osler Health Centre, Brampton, Ontario, Canada
• Sir John Harrington (adventurer), early-twentieth-century British adventurer who led an expedition to the Abyssinia-Sudan borders
• John Wilbur Harrington, North Carolina geologist, author of To See a World

Similarly named people

• John Harington (inventor), inventor of the flushable toilet and godson of Queen Elizabeth I
• John Harington, 1st Baron Harington of Exton
• John Herrington, astronaut

Fictional characters

• John Harrington in Mario Bava's film, Hatchet for the Honeymoon