Hazel Chu (born 3 November 1980) is an Irish Green Party politician who has been a member of Dublin City Council since May 2019. She was elected Cathaoirleach (Chairperson) of the Irish Green Party in December 2019, and was succeeded by Senator Pauline O'Reilly in December 2021. She was the first Irish-born person of Chinese descent elected to political office on the island of Ireland. She served as Lord Mayor of Dublin from 2020 to 2021, and in doing so became the first person of Chinese ethnicity to be mayor of a European capital.