Konstantin Viktorovich Fishman (; born 17 December 1977) is a Russian former professional footballer.
Born in Tyumen, Fishman began playing football in the youth academy of local club Dynamo-Gazovik Tyumen. Manager Vyacheslav Malofeev gave Fishman his professional debut at age 16 during the 1994 Russian Premier League season.
Fishman's father, Viktor, and brother, Sergey, were also footballers. Sergey played in the Russian Second Division with Irtysh Tobolsk.