Tatjana Smith is a South African professional swimmer specialising in breaststroke events. She is the former world record holder in the long course 200-metre breaststroke and is the African record holder in the long course and short course 100-metre breaststroke as well as the short course 200-metre breaststroke. She is a former African record holder in the long course 50-metre breaststroke and former South African record holder in the short course 50-metre breaststroke. She won the gold medal and set the world record in the 200-metre breaststroke and also won the silver medal in the 100-metre breaststroke at the 2020 Olympic Games.