2009 UCI Mountain Bike & Trials World Championships

The 2009 UCI Mountain Bike & Trials World Championships were held in Canberra, Australia from 1 to 6 September 2009. The disciplines included were cross-country, downhill, four-cross, and trials. The event was the 20th edition of the UCI Mountain Bike World Championships and the 24th edition of the UCI Trials World Championships.

The event was the second UCI Mountain Bike World Championships to be held in Australia, following the 1996 World Championships in Cairns.