| Venue: | Cairo, Egypt |
| Date: | 1–5 September |
| Velodrome: | Cairo International Velodrome |
| Cyclists: | 237 |
| Nations: | 47 |
| Events: | 22 |
| Previous: | 2019 |
| Next: | 2022 |
The 2021 UCI Junior Track Cycling World Championships were the annual Junior World Championship for track cycling hold at Cairo, Egypt from 1 to 5 September 2021.[1]
| Men's events | |||||||||
| Sprint[2] | |||||||||
| 1 km time trial[3] | 1:03.339 | 1:03.339 | 1:03.804 | ||||||
| Individual pursuit[4] | 3:12.351 | 3:15.686 | 3:14.214 | ||||||
| Team pursuit[5] | valign=top | 4:02.610 | valign=top | Bryan Olivo Andrea Violato Lino Colosio Alessio Delle Vedove Samuele Mion | 4:03.547 | valign=top | |||
| Team sprint[6] | valign=top | Bogdan Medenets David Shekelashvili Nikita Kalachnik Alexander Popov | 44.819 | valign=top | Luca Spiegel Paul Groß Willy Weinrich Max Briese | 45.080 | valign=top | Tomasz Grzesiak Marcin Marciniak Mateusz Przymusiński Radosław Laskowski | 46.404 |
| Keirin[7] | |||||||||
| Scratch[8] | |||||||||
| Points race[9] | 55 pts | 50 pts | 50 pts | ||||||
| Omnium[10] | 135 pts | 122 pts | 111 pts | ||||||
| Madison[11] | 52 pts | 43 pts | 30 pts | ||||||
| Elimination race[12] | |||||||||
| Women's events | |||||||||
| Sprint[13] | |||||||||
| 500 m time trial[14] | 34.294 | 35.353 | 35.438 | ||||||
| Individual pursuit[15] | 2:22.113 | 2:23.478 | 2:24.219 | ||||||
| Team pursuit[16] | valign=top | valign=top | 4:34.176 | valign=top | Olga Wankiewicz Maja Tracka Wiktoria Milda Tamara Szalińska Anna Długaś | 4:42.856 | |||
| Team sprint[17] | valign=top | Elizaveta Bogomolova Alina Lysenko Elizaveta Krechkina Varvara Blagodarova | 49.292 | valign=top | 51.344 | valign=top | Alessia Paccalini Sara Fiorin Valentina Basilico Rebecca Bacchettini | 51.021 | |
| Keirin[18] | |||||||||
| Scratch[19] | |||||||||
| Points race[20] | 73 pts | 54 pts | 48 pts | ||||||
| Omnium[21] | 122 pts | 118 pts | 110 pts | ||||||
| Madison[22] | 60 pts | 48 pts | 27 pts | ||||||
| Elimination race[23] | |||||||||