Former South Sydney Athletics club athlete Jessica Thornton (born 12 April 1998) is represented her country at the 2016 Summer Olympics. She holds a personal best of 52.05 seconds for the 400m. She was born in Randwick, New South Wales, competed for Randwick Botany Little Athletics club and South Sydney Senior Athletics club.Jessica studied nutrition science at the University of Wollongong. Thornton won the 400 m at the 2014 Summer Youth Olympics, setting a personal best of 52.50 seconds to beat Bahrain's Salwa Eid Naser. She ran for the Asia-Pacific relay team at the 2014 IAAF Continental Cup, though the team finished last. She was a relay finalist at the 2016 Summer Olympics alongside Anneliese Rubie, Caitlin Sargent and Morgan Mitchell.