- Sir Alan Gardiner (1879–1963), English Egyptologist
- Albert Gardiner , Australian politician
- Anthony W. Gardiner (1820–1885), President of Liberia
- Barry Gardiner (born 1957), Scottish politician
- Boris Gardiner (born 1943), Jamaican reggae musician
- Charlie Gardiner (ice Hockey Player) (1904–1934), Scottish-born Canadian ice hockey player
- Frank Gardiner , Scottish-born Australian bushranger
- Frederick Gardiner , Toronto politician
- Sir George Gardiner (politician) (1935–2002), English politician
- George Gardiner (soldier) (1821–1891), Irish recipient of the Victoria Cross
- Gerald Gardiner, Baron Gardiner (1900–1990), Lord Chancellor of the United Kingdom
- Harry Gardiner (born 1871), human fly
- Henry Balfour Gardiner (1877–1950), English composer
- Herb Gardiner (1891–1972), Canadian ice hockey player
- Colonel James Gardiner (1688–1745), Scottish soldier
- James Daniel Gardiner , 19th century American soldier
- James Garfield Gardiner (1883–1962), Canadian politician
- Sir John Eliot Gardiner (born 1943), English conductor
- John Sylvester John Gardiner (1765–1830), Welsh-born American clergyman
- Joseph Gardiner (1886–1965), Australian politician
- Kyoko Gardiner also known as Kiki Gardiner (born 1975), Japanese-born artist/activist/writer
- Marguerite, Countess Of Blessington (1789–1849), Irish writer
- Nevile Gardiner (1902–1954), English diplomat
- Pauline Gardiner , New Zealand politician
- Reginald Gardiner (1903–1980), English actor
- Sir Robert Septimus Gardiner (1856–?1936), English businessman
- Samuel Rawson Gardiner (1829–1902), English historian
- Stephen Gardiner (c.1493–1555), English Lord Chancellor and bishop
- Susan Gardiner (born 1980), Canadian water polo player
- Princess Muna Al-Hussein (born 1941), second wife of King Hussein of Jordan, born Toni Gardiner
- Wrey Gardiner (1901–1981), English writer, poet, editor and publisher
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