Korobeinik or Korobeynik is a Russian-language occupational surname, literally meaning the occupation of korobeinik, historical Russian travelling peddler.
Notable people with this surname include:
Andrei Korobeinik, Estonian computer programmer, entrepreneur, and politician, MP Tatiana Korobeinik (Tatyana Korobeynik), Russian rifle shooting sportswoman (1930-2021), Russian professor of mathematics
See also Korobeiniki (disambiguation) Korobeynikov