Engineers Australia (EA), known formally as the Institution of Engineers, Australia, is an Australian professional body and not-for-profit organisation whose purpose is to advance the science and practice of engineering for the benefit of the community. Engineers Australia is Australia's recognised organisation for accreditation of professional engineering qualifications under the Washington Accord. As of 2022, EA has 115,000 members, which includes 31,000 students.

The association began after World War I, following recognition of the need for a single body to represent engineers, rather than multiple smaller associations. The first council meeting of this single body was held in 1919, electing Professor William Warren of the University of Sydney as the first President. This formed the Institution of Engineers of Australia. On 1 May 1926 the Institution was incorporated as a company limited by guarantee. Twelve years later, on 10 March 1938 His Majesty King George VI granted a charter of incorporation to the Institution, reconstituting it as a body corporate and politic by Royal Charter.

The Institution of Engineers Australia is now known as Engineers Australia (EA). Engineers Australia wholly owns two subsidiaries, Engineering Education Australia and EngInsure. Engineers Australia previously had a publishing subsidiary Engineers Media which published the organisation's main magazine. Engineers Media ceased operations at the end of August 2015 after the magazine "create" was outsourced to a commercial publisher, Mahlab Media.

Membership is open to a variety of occupations. Membership is a requirement to seek credentials such as "Chartered".

Engineers Australia has the following membership types:

The occupational categories are:

The Colleges and College National Committees are:

The Chartered Areas of Practice are: