Leary is an Irish surname and may refer to:
King Leary or Lóegaire mac Néill, an Irish king Annie Leary, an American philanthropist and Papal Countess Arthur Leary, an American merchant Denis Leary (frequently misspelled as 'Dennis Leary'), an American actor, comedian, writer and film director Dennis Leary, an American restaurateur Devin Leary (born 1999), American football player Josephine Leary (1856–1923), American real estate entrepreneur Lewis Sheridan Leary, a participant in John Brown's raid on Harpers Ferry Michael Leary, an association football player for Barnet F.C. Paul Leary, an American musician and record producer Richard P. Leary, US Navy admiral in the Spanish–American War Thomas B. Leary (1931–2021), American attorney Timothy Leary, an American psychologist, writer and counterculture icon Warren D. Leary, American politician
See also Leary (disambiguation) O'Leary (surname) King Lear