- October 6: Elected as a Nationalist party candidate to the Legislative Council of the Victorian Parliament as Member for East Yarra; minister without portfolio.
- Birth of only daughter, Heather
- Charles Kingsford Smith, Charles Ulm and two Americans complete the first trans-Pacific flight crossing from San Francisco to Brisbane by way of Honolulu and Fiji.
- Australian airman Bert Hinkler becomes the first person to fly solo from Britain to Australia. The flight is completed in less than fifteen and a half days.
- The world's first flying medical service, the Aerial Medical Service was established on an experimental basis at Cloncurry, Queensland. Its first response to a call came on 17th May, 1928, with a flight from Cloncurry to Julia Creek.
- The service was founded by 'Flynn of the Inland', the Reverend John Flynn; the first pilot was Qantas' Arthur Affleck, and the first flying doctor Sydney surgeon Dr Kenyon Welch, who was chosen from a list of volunteers. In the first year Dr Welch saw 255 patients suffering conditions from typhoid fever to gunshot wounds.
- Aboriginals Ordinance decrees that only the NT Chief Protector could issue licences to employ Aboriginals.
- British women over 21 gain the right to vote.
- Fleming discovers penicillin which destroys bacteria, the first antibiotic.
- First commercially available television set, made by Daven, goes on sale in the US for $75.
- Mickey Mouse makes his first appearance in a sound film with the release of "Steamboat Willie".