Here’s a list of all Australian states and Territories and links to where you can apply for your Seniors Card.
NSW http://www.seniorscard.nsw.gov.au/
QLD https://www.qld.gov.au/seniors/legal-finance-concessions/seniors-card/applying-seniors-card
VIC https://www.seniorsonline.vic.gov.au/seniors-card
SA https://www.sa.gov.au/topics/family-and-community/seniors/seniors-card/apply-for-a-seniors-card
WA https://seniorscard.wa.gov.au/
TAS https://www.communities.tas.gov.au/csr/programs_and_services/seniors_card
ACT https://actseniorscard.org.au/index.php
NT https://ntseniorscard.org.au/