1991 Australian Under-16 Individual Speedway Championship

The 1991 Australian Under-16 Individual Speedway Championship was the tenth running of the Australian Under-16 Speedway Championship organised by Motorcycling Australia for bikes with 125cc engines. The final took place on 12 January 1991 at the 112 m Sidewinders Speedway in Adelaide, South Australia.

Local Adelaide based riders dominated the meeting filling eight of the top ten places. 1990 Australian Championship runner-up Ryan Sullivan took out his first Australian Championship with an unbeaten 15 point maximum to lead home Ashley Watson and Brett Woodifield who won a four-way runoff for third place over Troy Wyten, Ford Keane and Victorian Jason Stewart. Sullivan turned 16 a week after the championship and graduated into the senior ranks.

1991 Australian Under-16 Solo Championship

 * 12 January
 * Adelaide, South Australia - Sidewinders Speedway
 * Referee: 🇦🇺 Sam Bass