Sonia O'Sullivan is an Irish former track and field athlete. She won a gold medal in the 5000 metres at the 1995 World Championships, and a silver medal in the 5000 metres at the 2000 Olympic Games.
She is the current Irish Record holder 1500m, 1 mile, 2000m, 3000m, 5000m, 10,000m and half marathon.
Sonia is currently writing a weekly column for The Irish Times women’s sports section. In 2000, Running to Standstill, her photographic book was published. This was followed in 2006 by Sonia, My Story. Sonia currently splits her time between Ireland and Australia.