Isabel Collischonn

Isabel Collischonn (born 16 October 1982) is a former professional German tennis player.

Her highest WTA singles ranking is 409 (achieved October 2003) and her highest doubles ranking is 363 (October 2003). Collischonn has won two singles and one doubles titles on the ITF.

In September 2003, she won the ITF 25K tennis tournament in Jounieh, Lebanon, with partner Kira Nagy.