Deon Hemmings (born 10 September 1968 in Saint Ann, Jamaica) is a former female 400 metres hurdler.
Hemmings was the first ever Jamaican woman to win an Olympic Gold when she won the 400m Hurdles at the 1996 Olympics breaking the Olympic record which stood to 2004. Hemmings also won two silver medals at the 2000 Olympics in the 400m Hurdles and 4x400m Relay (together with Sandie Richards, Catherine Scott-Pomales and Lorraine Graham).
Hemmings also won a Silver medal in the 1994 Commonwealth Games, Bronze Medal in the 1995 World Athletics Championships, Silver in the 1997 World Athletics Championships and Bronze in the 1999 World Athletics Championships all in the 400m Hurdles.
Hemmings retired in 2003 and married Michael McCatty in 2004.