Harrigan may be:
- Bill Harrigan, Australian rugby league football referee
- Edward Harrigan (1845–1911), American actor
- David Xavier Harrigan (1948–2000), singer, actor, & painter Tomata du Plenty
- John Harrigan (fl. 1990s), actor, writer & filmmaker
- William Harrigan (1893–1966), American actor
- Tahesia Harrigan (1982-), world class sprinter from BVI
- Harrigan (TV series), Canadian children's television series
- Hop Harrigan, comic-strip aviator
- "Big John" Harrigan, nurturing pedophile in film L.I.E.
- "Harrigan" (song), by George M. Cohan from Fifty Miles From Boston
- Harrigan and Son, a 1960-1961 ABC situation comedy starring Pat O'Brien and Roger Perry, which used Cohan's song as its theme tune.
- Harrigan, N.Y., part of Ellenburg, New York