Leonovich (), Leanovich () or Leonovych () is a patronymic surname of East Slavic origin. Polish equivalent: Leonowicz, Lithuanian: Leonavičius, Leanavičius. It should not be confused with the patronymic component of the East Slavic name. Notable people with the surname include:
See also
21397 Leontovich (1998 FJ54), a main-belt asteroid Leontovich