The 2026 AU4 Australian Championship is a scheduled motor racing competition to be held in Australia for Formula 4 cars. It will be the eighth national championship in Formula 4, and the second under the name of AU4. The season will commence at Winton Motor Raceway on May 1 and will conclude at Sydney Motorsport Park at September 13.
The following circuits are due to host a round of the 2026 championship.