Julián Ganzábal (born 25 August 1946) is a former professional tennis player from Argentina.

His career singles highlights include winning the River Plate Championships four times (1968–69, 1973, 1976).

[2][3] As a doubles player he partnered with Davis Cup teammate Lito Álvarez to finish runner-up at Hilversum in 1974.

[4] At his best on clay, Ganzábal reached the third round of the 1976 French Open,[5] his best performance in a Grand Slam tournament.

Following retirement, he trained his younger brother Alejandro Ganzábal, who was also a professional tennis player.