| 1990 World Junior Championships in Athletics | |
| Host City: |  Plovdiv, Bulgaria |
| Nations: | 87 |
| Athletes: | 987 |
| Events: | 41 |
| Dates: | 8–12 August |
| Stadium: | 9th September Stadium |
| Previous: | 1988 Sudbury |
The 1990 World Junior Championships in Athletics was the 1990 edition of the World Junior Championships in Athletics. It was held in Plovdiv, Bulgaria on 8–12 August.
Davidson Ezinwa | 10.17 =CR | Jason Livingston | 10.25 | Rodney Bridges | 10.37 | ||
| Aleksandr Goremykin | 20.47 CR | Davidson Ezinwa | 20.75 | James Stallworth | 20.81 | ||
| Chris Nelloms | 45.43 CR | Rico Lieder | 46.28 | Mark Richardson | 46.33 | ||
Desta Asgedom | 1:46.35 CR | Jonah Birir | 1:46.61 | Norberto Téllez | 1:47.33 | ||
| Moses Kiptanui | 3:38.32 CR | Alemayehu Roba | 3:41.71 | Desta Asgedom | 3:43.38 | ||
| Fita Bayissa | 13:42.59 CR | Abreham Assefa | 13:44.63 | Francesco Bennici | 13:47.10 | ||
| Richard Chelimo | 28:18.57 CR | Ismael Kirui | 28:40.77 | Juma Ninga | 28:41.90 | ||
| Cosmas Ndeti | 59:42 | Juma Ninga | 1:00:30 | Dagane Dabela | 1:01:02 | ||
Antti Haapakoski | 13.74 | Alexis Sánchez | 13.75 | Kyle Vander-Kuyp | 13.85 | ||
| Rohan Robinson | 49.73 | Yoshihiko Saito | 49.99 | Aleksandr Belikov | 50.22 | ||
| Matthew Birir | 8:31.02 CR | Francisco Munuera | 8:41.03 | Simeon Rono | 8:42:05 | ||
| Ilya Markov | 39:55.52 | Alberto Cruz | 39:56.49 | Jefferson Pérez | 40:08.23 | ||
| 39.13 CR | 39.58 | 39.68 | |||||
| 3:02.26 | 3:03.80 | 3:05.51 | |||||
| Dragutin Topić | 2.37 WJR | Tim Forsyth | 2.29 | Stevan Zorić | 2.26 | ||
Jean Galfione | 5.45 | Dmitriy Kurkulin | 5.40 | Miroslav Dukov | 5.40 | ||
| James Stallworth | 8.12 CR | Dion Bentley | 8.05 | Kareem Streete-Thompson | 7.94 | ||
| Sergey Bykov | 16.98 CR | Yoelbi Quesada | 16.62 | Nikolai Raev | 16.22 | ||
| Viktor Bulat | 19.21 CR | Xie Shengying | 18.57 | Yuriy Ivanov | 18.13 | ||
| Ilian Iliev | 58.28 | Frank Bicet | 57.10 | Jan Engelmann | 56.82 | ||
| Tommi Viskari | 73.88 | Dariusz Trafas | 72.76 | Jarkko Heimonen | 72.30 | ||
| Andrey Debeliy | 70.60 | Savvas Saritzoglou | 70.32 | Andrey Budykin | 69.36 | ||
| Eric Kaiser | 7762 | Jarkko Finni | 7698 | David Bigham | 7488 | ||
| Andrea Philipp | 11.36 | Nikole Mitchell | 11.47 | Lucrécia Jardim | 11.52 | ||
| Diane Smith | 23.10 CR | Zundra Feagin | 23.13 | Lucrécia Jardim | 23.26 | ||
| Fatima Yusuf | 50.62 CR | Charity Opara | 51.28 | Manuela Derr | 51.95 | ||
| Liu Li | 2:03.65 | Magdalena Nedelcu | 2:04.52 | Aurica Rautu | 2:04.78 | ||
| Qu Yunxia | 4:13.67 | Claudia Mirela Bortoi | 4:14.19 | Malin Ewerlöf | 4:14.61 | ||
| Simona Staicu | 9:09.57 | Liu Shixiang | 9:10.54 | Hatsumi Matsumoto | 9:11.92 | ||
| Derartu Tulu | 32:56.26 | Rika Ota | 33:06.85 | Lydia Cheromei | 33:20.83 | ||
| Gillian Russell | 13.31 | Keri Maddox | 13.38 | Ilka Rönisch | 13.41 | ||
| Nelli Voronkova | 55.84 | Marjana Lužar | 56.74 | Omolade Akinremi | 56.97 | ||
| Susana Feitor | 21:44.30 CR | Tatyana Shchastnaya | 22:28.74 | Simone Thust | 22:44.65 | ||
| 43.82 | 44.16 | 44.50 | |||||
| 3:30.38 AU20R NU20R | 3:31.09 | 3:31.81 | |||||
| Svetlana Lavrova | 1.91 | Katja Kilpi | 1.88 | Lea Haggett | 1.88 | ||
| Iva Prandzheva | 6.53 | Erica Johansson | 6.50 | Sandrine Hennart | 6.49 | ||
| Qiu Qiaoping | 18.20 | Li Xiaoyun | 17.74 | Heike Hopfer | 17.27 | ||
| Natalya Koptyukh | 61.44 | Lisa-Marie Vizaniari | 60.44 | Anja Gündler | 59.30 | ||
| Tanja Damaske | 61.06 | Oksana Ovchinnikova | 57.26 | Mandy Liverton | 56.98 | ||
| Beatrice Mau | 6166 | Rita Ináncsi | 5940 | Joanne Henry | 5728 | ||
According to an unofficial count through an unofficial result list,[1] 987 athletes from 86 countries participated in the event. The number of athletes is in agreement, but there is one country less than the official number of 87 as published.