Neža Klančar (born 19 February 2000) is a Slovenian swimmer. She represented Slovenia at the 2019 World Aquatics Championships held in Gwangju, South Korea. She competed in the women's 50 metre freestyle and women's 100 metre freestyle events. In both events she did not advance to compete in the semi-finals. She also competed in the women's 200 metre individual medley where she also did not advance to compete in the semi-finals.