Ivan Vajda (born 4 September 1978) is a former professional tennis player from Croatia.

[1] His two ATP Tour main draw appearances in singles both came at the Croatia Open Umag, as a qualifier in 2000 and as a wildcard entrant in the 2001 tournament.

In June 2001 he reached his best ranking of 223 in the world and made the second round of qualifying at the Wimbledon Championships.

Later that year he appeared for the Croatia Davis Cup team in a World Group qualifying tie against Italy in Rome.

He featured in a dead rubber reverse singles match, which he lost to Italian Filippo Volandri.