Dawid Olejniczak (; born March 1, 1983, in à Âódà º) is a Polish former tennis player.
Olejniczak has a career-high ATP singles ranking of World No. 185, achieved on 11 August 2008. He also has a career-high ATP doubles ranking of World No. 206, achieved on 17 July 2006.
In June, Olejniczak qualified in singles for the 2008 Wimbledon Championships after defeating World No. 184 LukÃ¡à ¡ Rosol, No. 158 Aisam Qureshi, and Rik de Voest respectively in the three qualifying rounds.