Grace Brown (born 7 July 1992) is a former Australian road racing cyclist, specialising in road time trialling, who last rode for UCI Women's WorldTeam . In her final year of professional cycling, Brown won the women's individual time trial event at the 2024 Paris Olympics, the same event at the 2024 UCI World Road Cycling Championships and her fourth time trial title at the Australian Road Cycling Championships. She just missed out on a medal in the Tokyo 2020 Olympics women's time trial, finishing fourth. She also competed in the women's road race where she came 47th. She also won the monument classic Liege-Bastogne-Liege Femmes in the same year, and the time trial at the 2022 Commonwealth Games.
Brown started cycling in 2015 after previously being involved in running. She started 2018 riding for Holden Team Gusto Racing. She then joined British UCI team for the latter part of 2018 season after being selected as the recipient of the Amy Gillett Cycling Scholarship. Her first race for was the Tour of California, a UCI Women's World Tour event, that was held in mid-May.
Brown joined the team at the start of the 2019 season. She had a good start to the 2019 season winning the Australian National Time Trial Championships and a stage at the Tour Down Under. She achieved her first major victory in Europe in the autumn of 2020 winning Brabantse Pijl in a solo breakaway. She was awarded AusCycling's Female Road Cyclist of the Year award for 2020.
Brown started the 2021 season in Australia with second places in both the road race and time trial at the National Championships.
Brown had strong results in the 2021 Spring classics. She achieved her first victory in the Women's World Tour at Brugge-De Panne. She was also second at Nokere Koerse and third at the Tour of Flanders. She was selected in the Australian team to compete in the road race and time trial at the Tokyo Olympics. She finished fourth in the time trial.
In August 2021 Brown signed a two-year contract with French Women's WorldTeam . She ended the 2021 season early to have shoulder surgery.
Brown won the Liège-Bastogne-Liège Femmes in April. In June 2024 Brown announced her plan to retire from professional cycling at the end of the 2024 season and in the following month she won the Olympic time trial on very wet Parisian roads. In September, she won the time trial at the World Championships, becoming the first cyclist to win both the Olympic and World championship time trial races in the same season.
Brown was elected as president of The Cyclists' Alliance in October 2024.
Brown has worked as a commentator for SBS TV's cycling broadcasts in Australia. She also contributes a weekly podcast to SBS titled "Unclipped". In May 2025 she was named as race director for the women's version of a proposed revival of the Herald Sun Tour