Jack Hargreaves OAM (born 24 July 1993) is an Australian representative rower and a world and an Olympic champion.

[1][2] Raised in Nyngan in country New South Wales, Hargreaves was educated at St Joseph's College Hunters Hill where he took up rowing.

[3] From 2014 to 2023 Hargreaves was selected in the New South Wales men's senior eight to contest the King's Cup at the Interstate Regatta.

[7] He won the open men's national single scull title at the 2022 Australian Rowing Championships[8] and contested that same event for a third placing in 2023.

[10] Hargreaves made his Australian representative debut in the men's eight which raced at the World Rowing Cup I in Sydney in 2013.

[11] In 2017 Hargreaves was selected into the Australian men's coxless four with Spencer Turrin and Alexander Hill who'd been medallists in the four at World Championships in 2014 and 2015 respectively and with newcomer Joshua Hicks.

They took gold at the World Rowing Cup II in Poznan and then raced in the Australian men's senior eight at the WRC III in Lucerne to a silver medal.

In an effort to qualify the men's pair for the 2020 Olympics, selectors broke up the world champion four into other boats but left Hargreaves in the four.

[11] Hargreaves, Hill, Purnell and O'Brien were selected to race Australia's coxless four at the 2019 World Rowing Championships in Linz, Austria.

With Hargreaves' technique and style from the three seat the Australians kept their composure and held off the Romanians in a tight finish, taking the gold in an Olympic best time.

[11] In March 2022 Hargreaves, Turrin, Purnell and Jack O'Brien were selected as the men's four in the Australian squad for the 2022 international season and the 2022 World Rowing Championships.