The 2007 UCI Juniors Track World Championships were the 33rd annual Junior World Championships for track cycling held at Aguascalientes, in Mexico, from 4 to 7 August.
The Championships had ten events for men (sprint, points race, individual pursuit, team pursuit, 1 kilometre time trial, team sprint, keirin, madison, scratch race and omnium) and seven for women (sprint, individual pursuit, 500 metre time trial, points race, keirin, scratch race, team sprint).