The Queen's Birthday Honours 1975 were appointments in many of the Commonwealth realms of Queen Elizabeth II to various orders and honours to reward and highlight good works by citizens of those countries. They were published on 6 June 1975 for the United Kingdom, Australia (for Papua New Guinea), New Zealand, Mauritius, Fiji, the Bahamas, and Grenada. These were the last Birthday Honours on the advice of Australian Ministers for Papua New Guinea, as the nation gained independence from Australia on 16 September 1975.