Others
- John Harington (writer) (1561–1612), English writer, inventor of the flushing toilet
- John Lyle Harrington (1868-1942), American bridge engineer
- John Peabody Harrington (1884–1961), American ethnologist
- John Harrington (American football), American football player
- John Harrington (Red Sox CEO) (born c. late 1930s), American business manager
- John Harrington (ice hockey) (born 1957), American player
- John Harrington (photographer, author) (born 1966), American photographer
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