Liverpool Plains was an electoral district of the Legislative Assembly in the Australian state of New South Wales, created in 1859 and including the Liverpool Plains (which includes Quirindi and Gunnedah) and the extensive pastoral district around the Gwydir River in the northwest of the state. It was created when the seat of Liverpool Plains and Gwydir was divided into two. It was abolished in 1880, and partly replaced by Gunnedah. In 1904, with the downsizing of the Legislative Assembly after Federation, it was recreated, partly replacing Gunnedah and Quirindi. In 1920, with the introduction of proportional representation it was absorbed into Wammerawa, along with Castlereagh and Mudgee. Liverpool Plains was recreated for the 1927 election and finally abolished in 1962.