Gairdner is a surname. Notable people with the surname include:
- Alice Elizabeth Gairdner (1873âÂÂ1954), British plant scientist, geneticist and cytologist
- Bill Gairdner (1940âÂÂ2024), Canadian track and field athlete
- Douglas Gairdner (1910âÂÂ1992), Scottish pediatrician, research scientist, academic and author
- Charles Gairdner (1898âÂÂ1983), British Governor of Western Australia and Tasmania
- James Gairdner (1828âÂÂ1912), British historian
- John Gairdner (1790âÂÂ1876), Scottish politician
- Scott Gairdner (born 1985), American comedy writer, director and podcast
- William Gairdner (disambiguation), multiple people