You can apply for the Age Pension while living in Cairns, but eligibility is generally based on your age, Australian residence history, income and assets rather than your postcode. The standard pension rules apply nationally, although your circumstances may affect the amount payable and whether supplements or Rent Assistance are available. You can claim through myGov linked to Centrelink, or contact Services Australia for help with the application. Check the latest requirements and payment rates at servicesaustralia.gov.au, as they can change and the final decision is made by Services Australia.