Trimmer is a surname, and may refer to:
Arthur Trimmer (1805-1877), early Western Australian settler Barry Trimmer, English scientist studying biomechanics Ed Trimmer (born 1952), American legislator in the Kansas House of Representatives Eric J. Trimmer (1923–1998), English general practitioner and medical writer George Trimmer (born 1996), English rugby player Sir Jon Trimmer (1939–2023), "Jonty Trimmer", New Zealand ballet dancer Joshua Trimmer (1795–1857), English geologist born in Kent Joyce Trimmer (1927–2008), Canadian politician, first woman mayor of Scarborough, Ontario Lewis Trimmer (born 1989), English footballer Sarah Trimmer (1741–1810), English author of The Story of the Robins Tony Trimmer (born 1943), English racing car driver William Trimmer (1822–1867), winemaker and politician in South Australia