The Corporations Act 2001 (Cth) is an Act of the Commonwealth of Australia which sets out the laws dealing with business entities in Australia at the federal and interstate levels. It deals mainly with companies but also with other entities, such as partnerships and managed investment schemes. The Act is the primary basis of Australian corporations law.

The Corporations Act is the principal legislation which regulates companies in Australia. It covers matters such as the formation and operation of companies (in conjunction with any constitution that may be adopted by a company), duties of officers, takeovers and fundraising.