2012 World Junior Championships in Athletics – Women's 100 metres hurdles
The women's 100 metres hurdles at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 13, 14, and 15 July.
Medalists
Records
, the existing world junior and championship records were as follows.| World Junior Record | 12.84 | Zagreb, Yugoslavia | 16 July 1987 | |
| Championship Record | 12.96 | Sudbury, Canada | 29 July 1988 | |
| World Junior Leading | 13.11 | Cheboksary, Russia | 19 June 2012 |
Results
Heats
Qualification: The first 3 of each heat and the 6 fastest times qualified| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 4 | 7 | Noemi Zbären | 13.34 | Q | |
| 2 | 3 | 4 | Ekaterina Bleskina | 13.42 | Q | |
| 2 | 1 | 4 | Franziska Hofmann | 13.42 | Q | |
| 4 | 6 | 3 | Morgan Snow | 13.44 | Q | |
| 5 | 1 | 8 | Dior Hall | 13.45 | Q, SB | |
| 6 | 3 | 8 | Katarina Johnson-Thompson | 13.48 | Q, PB | |
| 7 | 4 | 2 | Alexandra Burghardt | 13.49 | Q, PB | |
| 8 | 2 | 7 | Michelle Jenneke | 13.52 | Q | |
| 9 | 1 | 3 | Samantha Scarlett | 13.62 | Q, PB | |
| 10 | 5 | 5 | Sade Mariah Greenidge | 13.63 | Q | |
| 11 | 6 | 4 | Chrisdale McCarthy | 13.68 | Q | |
| 12 | 2 | 8 | Dou Wang | 13.71 | Q | |
| 13 | 1 | 6 | Lilla Juhász | 13.73 | q, PB | |
| 14 | 3 | 7 | Jonna Berghem | 13.78 | Q | |
| 15 | 1 | 9 | Shakera Hall | 13.80 | q | |
| 16 | 5 | 6 | Deshaunda Morrison | 13.83 | Q | |
| 17 | 5 | 4 | Karolina Koleczek | 13.88 | Q | |
| 18 | 2 | 6 | Sarah Lavin | 13.90 | Q | |
| 19 | 6 | 9 | Mizuki Kugai | 13.92 | Q | |
| 20 | 6 | 8 | Suzanne Williams | 13.94 | q | |
| 21 | 4 | 3 | Mako Fukube | 13.96 | Q | |
| 22 | 4 | 8 | Manca Šepetavc | 13.97 | q | |
| 23 | 6 | 5 | Anastasia Nikolaeva | 13.97 | q | |
| 24 | 2 | 2 | Nicole Setterington | 13.98 | q | |
| 25 | 1 | 7 | Ching-Ju Hsieh | 14.02 | ||
| 26 | 6 | 6 | Anamaria Nesteriuc | 14.03 | PB | |
| 27 | 5 | 2 | Sophie Jancsurák | 14.04 | ||
| 28 | 3 | 6 | Abbie Taddeo | 14.05 | ||
| 29 | 3 | 5 | Giada Carmassi | 14.09 | ||
| 29 | 5 | 3 | Jana Sotáková | 14.09 | ||
| 31 | 2 | 3 | Eva Wimberger | 14.11 | PB | |
| 31 | 4 | 4 | Mathilde Heltbech | 14.11 | ||
| 33 | 5 | 8 | Vera Fernandes | 14.14 | PB | |
| 34 | 2 | 5 | Jatta-Juulia Hanski | 14.15 | ||
| 34 | 1 | 5 | Marthe Koala | 14.15 | SB | |
| 36 | 2 | 9 | Devynne Charlton | 14.20 | ||
| 37 | 4 | 5 | Devinn Cartwright | 14.21 | PB | |
| 38 | 3 | 9 | Kayla Gilbert | 14.23 | ||
| 39 | 6 | 7 | Laura Strajnar | 14.29 | ||
| 40 | 5 | 7 | Natshalie Isaac | 14.35 | ||
| 41 | 1 | 2 | Maria Paniz | 14.36 | ||
| 42 | 2 | 4 | Génesis Romero | 14.42 | ||
| 43 | 4 | 9 | Beyza Tilki | 14.76 | ||
| 3 | 3 | Ida Bakke Hansen | DQ | |||
| 4 | 6 | Yuliya Dolzhkova | DNF | |||
| 5 | 9 | Teresa Errandonea | DNS |
Semi-Final
Qualification: The first 2 of each heat and the 2 fastest times qualified| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 1 | 5 | Ekaterina Bleskina | 13.24 | Q | |
| 2 | 1 | 6 | Morgan Snow | 13.31 | Q | |
| 3 | 2 | 6 | Dou Wang | 13.40 | Q, PB | |
| 4 | 2 | 7 | Michelle Jenneke | 13.41 | Q | |
| 5 | 3 | 5 | Noemi Zbären | 13.46 | Q | |
| 6 | 2 | 5 | Franziska Hofmann | 13.53 | q | |
| 7 | 2 | 9 | Jonna Berghem | 13.64 | q | |
| 8 | 1 | 4 | Chrisdale McCarthy | 13.65 | ||
| 9 | 1 | 9 | Karolina Kołeczek | 13.66 | ||
| 10 | 3 | 7 | Dior Hall | 13.78 | Q | |
| 11 | 1 | 3 | Suzanne Williams | 13.79 | ||
| 12 | 3 | 9 | Samantha Scarlett | 13.88 | ||
| 13 | 3 | 8 | Mako Fukube | 13.92 | ||
| 14 | 2 | 4 | Katarina Johnson-Thompson | 13.94 | ||
| 15 | 2 | 2 | Nicole Setterington | 13.99 | ||
| 16 | 2 | 8 | Mizuki Kugai | 14.00 | ||
| 17 | 3 | 4 | Deshaunda Morrison | 14.03 | ||
| 18 | 3 | 2 | Anastasia Nikolaeva | 14.04 | ||
| 19 | 1 | 7 | Alexandra Burghardt | 14.07 | ||
| 20 | 2 | 3 | Shakera Hall | 14.10 | ||
| 21 | 3 | 3 | Lilla Juhász | 14.14 | ||
| 22 | 1 | 2 | Manca Šepetavc | 14.24 | ||
| 1 | 8 | Sarah Lavin | ||||
| 3 | 6 | Sade Mariah Greenidge |