Kren or Křen ("horseradish" in Czech and Austrian German) is a surname. Notable people with the surname include:
Brigitte Kren (born 1954), Austrian actress Jan Křen (1930–2020), Czech historian Kurt Kren (1929–1998), Austrian filmmaker Marvin Kren (born 1980), Austrian director Milan Křen (born 1965), Czech cyclist Vladimir Kren (1903–1948), Croatian major general
See also Krenn KREN-TV Thomas Krens, former director of the Solomon R. Guggenheim Foundation Dominique Crenn, a French chef