Esther Qin (; born 18 November 1991) is a Chinese-born Australian retired diver.
Qin was born in Liuzhou, Guangxi, China to a Zhuang family. Her family moved to Australia in 2009, as her father had found a position as a chef.
Qin started diving at the age of eleven in China and competed in several national competitions.
Qin competed at the 2013 Summer Universiade in Kazan, Russia, won a silver medal in the 3m synchronised with Samantha Mills. She also competed in the 1 m and 3 m springboard.<br /> At the 2014 Commonwealth Games in Glasgow, Scotland, she won the gold medal in the women's 3m springboard, a bronze medal in women's 1m springboard and came 4th in the women's synchronised 3 metre springboard alongside Anna Gelai. She was coached by Chava Sobrino at the New South Wales Institute of Sport.
At the 2015 World Aquatics Championships, Kazan, Russia, she won a bronze medal in the 3m synchronized with Samantha Mills.
She competed at the 2016 Olympics where she finished 6th in the women's 3 metre springboard event.
Qin partnered with Georgia Sheehan in the 2018 Commonwealth Games to achieve first place and received a gold medal in the 3m synchronised springboard event. Qin also won a bronze medal in the women's 1m springboard event and came 5th in the women's 3 metre springboard event.
Qin qualified for the Tokyo 2020 Olympics where she came 12th in the women's 3-metre springboard event.
She competed at the 2022 Commonwealth Games where she came 5th in the women's synchronised 3 metre springboard event alongside Brittany O'Brien and 6th in the women's 1 metre springboard event.
Qin announced her retirement from international diving on December 5, 2022.