Kjerulf (Kjærulf, Kjærulff, Kierulff, Kierulf, Kiærulff, Kiærulf, Kærulf or Kjaerulf) is a Danish surname. Notable people with the surname include:
People Axel Kjerulf (1884–1964), Danish composer Charles Kjerulf (1858–1919), Danish composer Halfdan Kjerulf (1815–1868), Norwegian composer Theodor Kjerulf (1825–1888), Norwegian geologist
Places Kjerulf Fjord, NE Greenland Kjerulf Glacier, South Georgia Kjerulfbreen, Svalbard Kjerulf Glacier (Jan Mayen), Jan Mayen Kjerulføya, island in Svalbard