Dekker is a surname. Notable people with the surname include:
Albert Dekker (1905–1968), American actor and politicianDesmond Dekker (1941–2006), Jamaican singerEduard Douwes Dekker (1820–1887), Dutch writer; also known as MultatuliErnest Douwes Dekker (1879–1950), Dutch politician and writerErik Dekker (born 1970), former Dutch professional cyclistFemke Dekker (born 1979), Dutch rowerFred Dekker (born 1959), American film director and writerInge Dekker (born 1985), Dutch competitive swimmerJeremias de Dekker (c. 1610 – 1666), Dutch poetJohn Dekker, volleyball playerJohn Dekker (Wing Commander), computer game characterLaura Dekker (born 1995), Dutch solo sailorLia Dekker (born 1987), Dutch competitive swimmerMark Dekker (born 1969), Zimbabwean cricketerRon Dekker (born 1966), former Dutch competitive swimmerSander Dekker (born 1975), Dutch politicianTed Dekker (born 1962), Indonesian-born American authorTheodorus Dekker (born 1927), mathematicianThomas Dekker (born 1987), American actorThomas Dekker (born 1984), Dutch professional cyclistThomas Dekker (c. 1572 – 1632), English writerWisse Dekker (born 1924), Dutch businessman and former CEO of PhilipsDekker Dreyer (born 1980), American film director and producer