State constitutions in Australia

State constitutions in Australia are the legal documents that establish and define the structure, powers, and functions of the six state governments in Australia.

Each state constitution preceded the federal Constitution of Australia as the constitutions of the then six self-governing colonies. Upon federation in 1901, the states ceded certain powers to the federal government.

Each state has its own constitution, which serves as a foundational legal document to govern the state's legislative, executive, and judicial branches. These constitutions are separate from the Australian Constitution, which governs the federal government of Australia; and is also the relevant constitutional document for each of Australia's territories.