Barbara Mulej (born 29 May 1974) is a Slovenian former professional tennis player.

Mulej won eleven singles titles and one doubles title on the ITF Circuit in her career.

On 13 June 1994, she reached her best singles ranking of world No.

Playing for Slovenia Fed Cup team, Mulej has accumulated a win–loss record of 19–8.

This biographical article relating to Slovenian tennis is a stub.