The 2012 Biathlon Junior World Championships was held in Kontiolahti, Finland from January 20 to January 26, 2012. There was to be a total of 16 competitions: sprint, pursuit, individual, mass start, and relay races for men and women.
| Event: | Gold: | Time | Silver: | Time | Bronze: | Time | |
| 10 km individual details | Julia Bartolomäs | 40:35.2 (1+0+1+1) | Galina Vishnevskaya | 40:54.4 (0+2+0+2) | Hilde Fenne | 41:05.0 (1+3+1+1) | |
| 6 km sprint details | Hilde Fenne | 18:48.3 (0+1) | Niya Dimitrova | 19:07.9 (0+0) | Lisa Theresa Hauser | 19:41.4 (0+1) | |
| 7.5 km pursuit details | Grete Gaim | 27:18.1 (0+0+1+0) | Julia Ransom | 27:24.9 (0+0+0+2) | Annika Knoll | 27:35.6 (0+0+1+0) | |
| 3 × 6 km relay details | Yuliya Zhuravok Yuliya Brhyhnets Anastasiya Merkushyna | 1:03:53.2 (0+0) (0+2) (0+0) (0+0) (0+0) (0+2) | Linn Persson Hanna Öberg Lotten Sjödén | 1:04:51.4 (0+2) (0+0) (0+2) (0+1) (0+0) (0+1) | Christina Rieder Julia Reisinger Lisa Theresa Hauser | 1:04:52.6 (0+1) (0+0) (0+0) (0+1) (0+3) (0+0) |
| Event: | Gold: | Time | Silver: | Time | Bronze: | Time | |
| 12.5 km individual details | Chardine Sloof | 43:44.5 (0+0+0+1) | Monika Hojnisz | 43:51.0 (0+1+0+1) | Elena Badanina | 44:19.2 (0+1+0+2) | |
| 7.5 km sprint details | Elena Ankudinova | 22:27.9 (0+0) | Anaïs Chevalier | 22:35.9 (0+0) | Margarita Vasileva | 22:44.1 (1+0) | |
| 10 km pursuit details | Chardine Sloof | 34:52.3 (0+0+0+0) | Olga Iakushova | 35:24.3 (1+0+0+2) | Iryna Kryuko | 35:35.4 (0+2+1+0) | |
| 3 × 6 km relay details | Thekla Brun-Lie Hilde Fenne Marion Rønning Huber | 1:01:37.6 (0+1) (0+1) (0+2) (0+1) (0+1) (0+3) | Alexia Runggaldier Giulia Collavo Nicole Gontier | 1:01:54.2 (0+2) (0+0) (0+1) (0+0) (0+3) (0+0) | Iryna Varvynets Alla Gylenko Iana Bondar | 1:02:01.6 (0+0) (0+0) (0+1) (0+1) (0+1) (1+3) |
| Event: | Gold: | Time | Silver: | Time | Bronze: | Time | |
| 12.5 km individual details | Aristide Begue | 40:45.8 (0+1+0+0) | Maksim Ramanouski | 41:33.6 (2+0+0+0) | Artem Tyshchenko | 42:00.7 (0+1+1+1) | |
| 7.5 km sprint details | Johannes Thingnes Bø | 19:15.0 (1+1) | Maksim Ramanouski | 20:05.8 (1+0) | Artem Tyshchenko | 20:07.6 (0+0) | |
| 10 km pursuit details | Johannes Thingnes Bø | 29:13.6 (0+1+0+2) | Matthias Dorfer | 31:14.0 (0+0+0+0) | Maksim Ramanouski | 31:32.0 (0+1+1+0) | |
| 3 × 7.5 km relay details | Clemet Dumont Florian Rivot Aristide Begue | 1:06:44.3 (0+0) (0+0) (0+3) (0+3) (0+2) (0+3) | Per Niklas Forsberg Victor Olsson Robert Sjöström | 1:07:22.5 (0+3) (0+1) (0+2) (0+3) (0+2) (0+1) | Niklas Homberg Maximilian Janke Matthias Dorfer | 1:07:39.9 (0+1) (0+0) (0+3) (0+0) (1+3) (1+3) |
| Event: | Gold: | Time | Silver: | Time | Bronze: | Time | |
| 15 km individual details | Kurtis Wenzel | 44:09.2 (0+1+0+0) | Marius Hol | 44:52.0 (0+0+0+2) | Alexandr Loginov | 45:07.2 (1+1+1+0) | |
| 10 km sprint details | Maxim Tsvetkov | 25:15.0 (1+0) | Florent Claude | 25:20.3 (1+0) | Simon Desthieux | 25:22.3 (0+0) | |
| 12.5 km pursuit details | Maxim Tsvetkov | 33:20.3 (0+0+0+0) | Vetle Sjåstad Christiansen | 35:02.9 (0+0+1+1) | Alexandr Loginov | 35:06.8 (0+0+1+2) | |
| 4 × 7.5 km relay details [1] | Erling Ålvik Johannes Thingnes Bø Marius Hol Vetle Sjåstad Christiansen | 1:21:50.4 (0+2) (0+1) (0+0) (0+1) (0+2) (0+2) (0+0) (0+2) | Vlastimil Vávra Matěj Krupčík Michal Żak Michal Krčmář | 1:23:13.9 (0+0) (0+1) (0+0) (0+2) (0+0) (0+0) (0+2) (0+1) | Antonin Guigonnat Baptiste Jouty Florent Claude Simon Desthieux | 1:23:14.12 (0+0) (1+3) (0+1) (0+1) (0+3) (0+3) (0+1) (1+3) |