The South Australian Labor Party, officially known as the Australian Labor Party (South Australian Branch) and commonly referred to simply as South Australian Labor, is the South Australian Branch of the Australian Labor Party, originally formed in 1891 as the United Labor Party of South Australia. It is one of two major parties in the bicameral Parliament of South Australia, the other being the Liberal Party of Australia (SA Division).

The Australian Labor Party (ALP), also commonly known as the Labor Party or simply Labor, is the major centre-left political party in Australia and one of two major parties in Australian politics, along with the centre-right Liberal Party of Australia. The party has been in government since being elected at the 2022 federal election, and with political branches in each state and territory, they currently form government in New South Wales, Queensland, South Australia, Victoria, Western Australia, the Australian Capital Territory, and the Northern Territory. As of 2023, Tasmania is the only state or territory where Labor forms the opposition. It is the oldest continuous political party in Australian history, being established on 8 May 1901 at Parliament House, Melbourne, the meeting place of the first federal Parliament.