Reardon may refer to:
The surname of Gaelic origin. Reardon is an anglisation of the modern Irish Gaelic Ó Ríordáin, which derived from the oiriginal ‘Ó Ríoghbhardáin’, meaning ‘’royal poet (from the Irish Gaelic words, ‘’rí’’ = king, and the diminutive form of '’bárd’)’.
- Persons
- Beans Reardon (1897-1984), an American umpire in Major League Baseball
- Bill Reardon (* 1941), an American politician and educator
- Brian Reardon (* 1966), an American guitarist
- Casper Reardon (1907–1941), a classical and later jazz harpist
- David Reardon the American director of the Elliot Institute
- Dom Reardon, a British comics artist (2000AD)
- Foxo Reardon (1905-1955), an American comic strip creator (Bozo)
- Jack Reardon (1914-1991), Australian rugby league footballer and writer
- Jeff Reardon (* 1955), an American baseball relief pitcher
- Jim Reardon, a director and storyboard consultant (The Simpsons)
- John Reardon (* 1975), a Canadian actor and former college football player
- John Reardon (baritone) (1930–1988), an American baritone and actor
- Ken Reardon (1921–2008), a Canadian professional ice hockey player
- Kerry Reardon, American football player
- Mara Candelaria Reardon, an American politician and representative (Indiana Democrats)
- Michael Reardon (climber) (* 1974), an American professional Free Solo Climber, filmmaker, motivational speaker and writer
- Michael Reardon (English architect), an English architect, historic building consultant, and interior designer
- Michael Reardon (New Zealand) (1876-1945), a New Zealand political activist
- Nathan Reardon (* 1984), an Australian professional cricketer
- Phil Reardon (1883-1920), an American professional baseball player
- Ray Reardon (* 1932), a retired Welsh snooker player
- Steve Reardon (* 1971), an Australian rugby league player
- Stuart Reardon (* 1981), an English rugby league player
- Terry Reardon (1919-1993), a Canadian professional ice hockey player
- William Reardon Smith (1856–1935), a British shipowner
- Places
- Reardon, Illinois, a place in Illinois
- Edmund Reardon House, an historic house in Cambridge, Massachusetts
- Nelson-Reardon-Kennard House, a historic home at Abingdon, Harford County, Maryland
- Media
- And Miss Reardon Drinks A Little, an American play written by Paul Zindel
- A Night in the Life of Jimmy Reardon, a 1988 film
- Ed Reardon's Week, a sitcom on BBC Radio 4
- Other
- Reardon Smith Baronets, a title in the Baronetage of the United Kingdom