The UCI Juniors World Championships were a set of UCI World Championships events for junior cyclists in 2005 to 2009. In 2010 it was divided into:

• The Junior men's road race at the UCI Road World Championships
• The UCI Junior Track Cycling World Championships

Year	Country	Location
2005	Austria	Vienna
2006	Belgium	Ghent
2007	Mexico	Aguascalientes
2008	South Africa	Cape Town
2009	Russia	Moscow

• UCI Junior Track Cycling World Championships