Data sources

Public authorities

From RightToKnow.org.au

All Australian public Authorities

Parliament of Australia

From https://www.aph.gov.au/Senators_and_Members/Guidelines_for_Contacting_Senators_and_Members/Address_labels_and_CSV_files:

List of all Members of the House of Representatives plus pdf with email addresses.
List of all Senators plus pdf with email addresses.

See also various schedules, such as pdfs from Senate Estimates.

Assembly of the ACT

List of all members of the Assembly misses the speaker's electorate.
Better to parse HTML

Parliament of New South Wales

From https://www.parliament.nsw.gov.au/members/downloadables/Pages/downloadable-lists.aspx:

Legislative Assembly of the Northern Territory

Seems to be only available by selecting individual members or in pdf:

List of all Members of the Legislative Assembly

Queensland Parliament

From https://www.parliament.qld.gov.au/Members/Current-Members/Full-Mailing-Lists

List of all members of the Assembly

Parliament of South Australia

In html:

List of All members of the House of Assembly contains an iframe whose content is dynamically generated from JSON
List of All members of the Legislative Council contains an iframe whose content is dynamically generated from JSON

Parliament of Tasmania

From the House of Assembly and Legislative Council websites:

List of all House of Assembly Members
List of all Legislative Council Members

Parliament of Victoria

From https://www.parliament.vic.gov.au/about/people-in-parliament/members:

Parliament of Western Austraila

Seems to be only html and pdf.

List of Members of the Legislative Assembly
List of Members of the Legislative Council