World Junior Records are those officially ratified by the IAAF. Junior Records are restricted to athletes who do not turn 20 at any time during the calendar year in which the mark is made.
Symbols: + = event not officially recognized by the IAAF; (A) = altitude-aided mark—over 1000m of altitude (in affected events only); i = made indoors; p = mark still pending ratification
| Running Events | ||||
| 100 | 10.88 | Marlies Göhr (East Germany) | Dresden, Germany | 7/01/77 |
| 10.75p | Sha’Carri Richardson (US) | Austin, Texas | 6/08/19 | |
| 200 | 22.18 | Allyson Felix (US) | Athens, Greece | 8/25/04 |
| 22.17p | Sha’Carri Richardson (US) | Austin, Texas | 6/08/19 | |
| 400 | 49.42 | Grit Breuer (Germany) | Tokyo, Japan | 8/27/91 |
| 800 | 1:54.01 | Pamela Jelimo (Kenya) | Zürich, Switzerland | 8/29/08 |
| 1000 | 2:35.4 | Irina Nikitina (Soviet Union) | Podolsk, Russia | 8/05/79 |
| 2:35.4 | Katrin Wühn (East Germany) | Potsdam, East Germany | 7/12/84 | |
| 1500 | 3:51.34 | Yinglai Lang (China) | Shanghai, China | 10/19/97 |
| [T&FN believes all the marks made in the Chinese National Games of ’93 and ’97 are flawed. We believe the “real” fastest is 3:56.98 Faith Kipyegon (Kenya) 5/10/13] | ||||
| Mile | 4:17.57 | Zola Pieterse (Great Britain) | Zürich, Switzerland | 8/21/85 |
| Steeple | 8:58.78 | Celliphine Chespol (Kenya) | Eugene, Oregon | 5/26/17 |
| 3000 | 8:28.83 | Zola Pieterse (Great Britain) | Rome, Italy | 9/07/85 |
| 5000 | 14:30.88 | Tirunesh Dibaba (Ethiopia) | Bergen, Norway | 6/11/04 |
| 10,000 | 30:26.50 | Linet Masai (Kenya) | Beijing, China | 8/15/08 |
| 100 Hurdles | 12.71 | Brittany Anderson (Jamaica) | Joensuu, Finland | 7/24/19 |
| 400 Hurdles | 53.60 | Sydney McLaughlin (US) | Fayetteville, Arkansas | 4/27/18 |
| 52.75p | Sydney McLaughlin (US) | Knoxville, Tennessee | 5/13/18 | |
| Relay Events | ||||
| 4 x 100 | 43.27 | Germany | Grosseto, Italy | 7/23/17 |
| (Katrin Fehm, Keshia Kwadwo, Sophia Junk, Jennifer Montag) | ||||
| 4 x 400 | 3:27.60 | United States | Grosseto, Italy | 7/18/04 |
| (Alex Anderson 53.1, Ashlee Kidd 51.6, Stephanie Smith 51.0, Natasha Hastings 51.9) | ||||
| 3:24.04(A)p | United States | San José, Costa Rica | 7/21/19 | |
| (Alexis Holmes 51.6, Kimberly Harris 51.2, Ziyah Holman 51.4, Kayla Davis 49.8) | ||||
| Field Events | ||||
| High Jump | 2.01 | 6-7 | Olga Turchak (Soviet Union) | Moscow, Russia | 8/08/86 |
| 2.01 | 6-7 | Heike Balck (East Germany) | Chemnitz, Germany | 6/18/89 | |
| 2.02 | 6-7½p | Yaroslava Mahuchikh (Ukraine) | Doha, Qatar | 9/30/19 | |
| 2.04 | 6-8¼p | Yaroslava Mahuchikh (Ukraine) | Doha, Qatar | 9/30/19 | |
| Pole Vault | 4.71 | 15-5½i | Wilma Murto (Finland) | Zweibrücken, Germany | 1/31/16 |
| Long Jump | 7.14 | 23-5¼ | Heike Drechsler (East Germany) | Bratislava, Slovakia | 6/03/83 |
| Triple Jump | 14.62 | 47-11¾ | Tereza Marinova (Bulgaria) | Sydney, Australia | 8/25/96 |
| Shot | 20.54 | 67-4¾ | Astrid Kumbernuss (East Germany) | Orimatilla, Finland | 7/01/89 |
| Discus | 74.40 | 244-1 | Ilke Wyludda (East Germany) | Berlin, Germany | 9/13/88 |
| Hammer | 73.24 | 240-3 | Wenxiu Zhang (China) | Changsha, China | 6/24/05 |
| Javelin | 63.86 | 209-6 | Yulenmis Aguilar (Cuba) | Edmonton, Alberta | 8/02/15 |
| Multi Event | ||||
| Heptathlon | 6542 | Carolina Klüft (Sweden) | Kingston, Jamaica | 7/19-20/02 |
| (13.33, 1.89/6-2¼, 13.16/43-2¼, 23.71 [3915], 6.36/20-10½, 47.61/156-2, 2:27.99 [2627]) | ||||
| Road Event | ||||
| Marathon+ | 2:20:49 | Shure Demise (Ethiopia) | Dubai, United Arab Emirates | 1/23/15 |
| Walk Events | ||||
| 10,000 | 42:47.25 | Anežka Drahotová (Czech Republic) | Eugene, Oregon | 7/23/14 |
| 10K Road | 41:57 | Hongmiao Gao (China) | Beijing, China | 9/08/93 |
| 20K Road+ | 1:25:30 | Anisya Kirdyapkina (Russia) | Adler, Russia | 2/23/08 |
| 1:25:29p | Glenda Estefanía Morejón (Ecuador) | La Coruña, Spain | 6/08/19 | |
as of October 15, 2019