Antoinette Uys (born 2 March 1976) is a badminton player from South Africa. She was the mixed doubles gold medalists at the and 2003 All-Africa Games. Uys competed in badminton at the 2004 Summer Olympics in the mixed doubles with partner Chris Dednam. They lost to Tsai Chia-Hsin and Cheng Wen-Hsing of Chinese Taipei in the round of 32.