Kirchhoff, Kirchoff or Kirchhoffer is a German surname. Notable people with the surname include:
Adolf Kirchhoff (1826–1908), German classical scholar and epigrapherAlfred Kirchhoff (1838–1907), German geographer and naturalistAlphonse Kirchhoffer (1873–1913), French Olympic fencerCharles William Henry Kirchhoff (1853-1916), American editor and metals expertDetlef Kirchhoff (1967–), German rowerFritz Kirchhoff (1901–1953), German screenwriter, film producer and directorGustav Kirchhoff (1824–1887), German physicist, the discoverer of "Kirchhoff's laws"Gottlieb Kirchhoff (1764–1833), Russian chemistJan Kirchhoff (1990–), German footballer, currently playing for Sunderland FCMary Kirchoff (born 1959), American fantasy novelistPaul Kirchhoff (1900–1972), German anthropologist and ethnologist of pre-Columbian Mesoamerican culturesRobert Kirchhoff (born 1962), Slovak film directorUlrich Kirchhoff (1967–), German show jumping champion