Niki Gudex (Guildford, England) is an Australian professional mountain biker from Sydney. She competes in both downhill and cross country disciplines.

In addition to being a professional mountainbiker, Gudex is also a model and a graphic designer. In the Australian edition of FHM magazine she has been listed in the 100 Sexiest Women in the World in 2002, 2003, 2004, 2005 and 2006.