Crimmins is a surname. Notable people with the surname include:
- Alice Crimmins (born 1939), 1960s American murder trial suspect
- Allison Crimmins, American climate scientist
- Barry Crimmins (1953–2018), American comedian
- Bernard Anthony Crimmins (1919–1993) is a former offensive lineman in the National Football League
- Bryan Crimmins (1919–1998), Australian rules footballer
- Eileen M. Crimmins, gerontologist and Edna M. Jones Professor of Gerontology at the University of Southern California
- John D. Crimmins (1844–1917), New York City contractor and philanthropist
- John Hugh Crimmins (1919–2007), American diplomat
- Joseph Ray Crimmins (1921–1989), American politician
- Michael Crimmins (born 1974), Irish hurler
- Peter Crimmins (1948–1976), rover for the Hawthorn Football Club
- Roy Crimmins (1929–2014), English jazz musician