Connolly (Irish: Ó Conghaile, Ó Conghalaigh) is a surname of Irish origin. Notable people with the surname include:
- James Connolly (Irish: Séamas Ó Conghaile) (born 5 June 1868 – 12 May 1916) was an Irish republican, socialist, and trade union leader.
- Alan Connolly (cricketer) (born 1939), Australian cricketer
- Amy Connolly, American physicist
- Billy Connolly (born 1942), Scottish comedian
- Brett Connolly (born 1992), Canadian professional ice hockey player
- Brian Connolly (1945–1997), vocalist for band Sweet
- Chris Connolly (born 1963), coach of the Fremantle Football Club
- Colm Connolly (born 1964), American judge
- Colm Connolly (journalist) (1942–2025), Irish journalist and newsreader
- C. P. Connolly (1863–1935), radical American investigative journalist
- Cyril Connolly (1903–1974), English man of letters
- Dan Connolly, multiple people
- David Connolly (born 1977), Irish footballer
- Fintan Connolly, Irish film director and screenwriter
- Gary Connolly (born 1971), English Rugby League player
- Gerry Connolly (born 1950), United States Congressman from Virginia
- Hal Connolly (1931–2010), American hammer thrower
- Harold Connolly (1901–1980), Nova Scotia journalist
- James Connolly, multiple people
- John Connolly, multiple people
- Joseph Connolly, multiple people
- Kevin Connolly (actor) (born 1974), American actor
- Kristen Connolly, an American actress and former professional tennis player
- Mark Connolly, Irish footballer
- Matthew Connolly (born 1987), footballer
- Matthew William Kemble Connolly (1872–1947), a British army officer and malacologist
- Maureen Connolly (1934–1969), American professional tennis player
- Maurice Connolly (1877–1921), representative from Iowa
- Megan Connolly, multiple people
- Michael Connolly, multiple people
- Myles Connolly (1897–1964), Writer, Screenwriter, Oscar Nominee (Music for Millions, 1944)
- Nathan Connolly, guitarist for alternative rock band Snow Patrol
- Pat Connolly, multiple people
- Patricia Connolly, Scottish bioengineer
- Patrick Connolly, former Attorney General of Ireland
- Peter Connolly, multiple people
- Richard B. Connolly (1810–1880), New York politician
- Robert Connolly, Australian filmmaker
- Roddy Connolly (1901–1980), Irish socialist
- Susan E. Connolly (born c. 1980), Irish writer
- Sybil Connolly, Irish Fashion Designer
- Thomas Connolly, multiple people
- Tim Connolly (born 1981), American ice hockey player
- Tyler Connolly, vocalist for band Theory of a Deadman
- Walter Connolly (1887–1940), American character actor
- William Connolly, multiple people
See also
- John Connally, Governor of Texas, 1963–69
- William Connolley (born 1964), climate modeler and Wikipedian
- Arthur Conolly (born 1807), British intelligence officer
- Edward Conolly (disambiguation), multiple people
- William Conolly (1662–1729), Irish politician and landowner
- USS Conolly (DD-979), named for the US Navy WW II Admiral Richard Lansing Conolly
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