Rainer Eitzinger (born 26 June 1983) is an Austrian former professional tennis player.

He turned professional in 2003, and he achieved his career-high singles ATP ranking of 166 in July 2006.

[1] He retired in 2011.

He played mostly in the ATP challenger and the ITF Futures circuits.

He also represented Austria in a Davis Cup match in 2006 vs. Mexico, where he defeated Daniel Garza.