Dieleman or Dielemans is a patronymic surname of Dutch and Flemish origin, derived from a pet form of Diedrick. Notable people with the surname include:

Bill Dieleman (born 1931), American politician Frans Dieleman (1942–2005), Dutch geographer and professor Martijn Dieleman (born 1979), Dutch volleyball player Mitch Dielemans (born 1993), Dutch archer Paul Dielemans (born 1957), Dutch sailor

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