Jillian Richardson (born March 10, 1965 in Guayaguayare, Trinidad and Tobago) is a Canadian athlete who competed mainly in the 400 metres. She is a three-time Olympian. In 1988, she equalled Marita Payne's Canadian 400 metres record of 49.91 secs. The record (as of 2014) still stands.
Richardson won a Gold medal at the 1982 Commonwealth games as a member of the 4 x 400 meter relay team. She repeated that feat at the 1986 Commonwealth games, as well a winning a silver in the 400 meters. She was a member of the 4 x 400 metre relay that took a silver medal in the 1983 Pan Am Games. She won a silver in the 400 meters at the 1987 Pan Am games, and as part of the Canadian 4 x 400 meter relay team. She took a gold medal in the 400 metres and a silver medal in the 4 x 400 metre relay at the Francophone Games in 1989.
She competed for Canada at three Olympic Games. At the 1984 Olympics in Los Angeles, she won the Silver medal in the 4 x 400 metres relay with her team mates Charmaine Crooks, Molly Killingbeck and Marita Payne. At the 1988 Olympics in Seoul, she was eliminated in the 400 metres semi-finals, running 49.91. It was the first time someone had broken 50 seconds and failed to reach the final. Canada failed to finish the 4 x 400 m relay final due to an injury to Molly Killingbeck. At the 1992 Olympics in Barcelona, she finished fifth in the 400 m final, in 49.93 and fourth in the 4 x 400 m relay final.