2012 World Junior Championships in Athletics – Men's 110 metres hurdles
The men's 110 metres hurdles at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 10–12 July.
Medalists
Records
, the existing world junior and championship records were as follows.Results
Heats
Qualification: The first 2 of each heat and the 8 fastest times qualified| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 3 | 2 | Yordan O'Farrill | 13.44 | Q | |
| 2 | 1 | 2 | Nicholas Hough | 13.51 | Q | |
| 3 | 6 | 8 | Wilhem Belocian | 13.63 | Q, PB | |
| 4 | 5 | 2 | James Gladman | 13.69 | Q | |
| 5 | 6 | 4 | Jussi Kanervo | 13.73 | Q | |
| 6 | 8 | 8 | Dondre Echols | 13.74 | Q | |
| 7 | 4 | 8 | Shinya Tanaka | 13.77 | Q, PB | |
| 7 | 7 | 4 | Chu Pengfei | 13.77 | Q | |
| 9 | 3 | 8 | Brahian Peña | 13.79 | Q | |
| 10 | 4 | 4 | Stefan Fennell | 13.81 | Q | |
| 11 | 4 | 3 | Cheng Yun-yin | 13.82 | q | |
| 11 | 6 | 6 | Calvin Arsenault | 13.82 | q, PB | |
| 13 | 1 | 5 | Elmo Lakka | 13.84 | Q | |
| 14 | 8 | 2 | Yanick Hart | 13.87 | Q | |
| 15 | 6 | 3 | Lucas Carvalho | 13.89 | q | |
| 16 | 7 | 7 | Máté Gönczöl | 13.89 | Q | |
| 17 | 7 | 8 | Kirill Nevdakh | 13.89 | q | |
| 18 | 5 | 5 | Supun Viraj Randeniya | 13.90 | Q, NJ | |
| 19 | 1 | 3 | Ruebin Walters | 13.92 | q, PB | |
| 19 | 3 | 6 | Yaqoub Mohamed Al-Youha | 13.92 | q | |
| 19 | 8 | 7 | Lorenzo Perini | 13.92 | q | |
| 22 | 2 | 5 | Jonas Christen | 13.94 | Q | |
| 23 | 6 | 5 | Kittipong Kongdee | 13.94 | q | |
| 24 | 5 | 3 | Sebastian Barth | 13.97 | ||
| 25 | 4 | 2 | César Ramírez | 14.01 | ||
| 26 | 3 | 3 | Lorenzo Vergani | 14.03 | ||
| 27 | 2 | 7 | Grzegorz Szade | 14.04 | Q | |
| 27 | 2 | 6 | Joshua Thompson | 14.04 | Q | |
| 29 | 3 | 5 | Shunya Takayama | 14.06 | PB | |
| 30 | 1 | 8 | Filip Drozdowski | 14.09 | ||
| 31 | 5 | 7 | Moussa Mohamed Al-Sabyani | 14.13 | ||
| 32 | 5 | 8 | Rio Maholtra | 14.16 | ||
| 33 | 8 | 3 | José Chorro | 14.17 | ||
| 34 | 8 | 5 | Sebastian Kapferer | 14.21 | ||
| 35 | 1 | 6 | Moriel Pitt | 14.25 | ||
| 36 | 3 | 7 | Maor Szeged | 14.28 | ||
| 37 | 6 | 7 | Tre Adderley | 14.29 | ||
| 38 | 2 | 4 | Diego Lyon | 14.31 | ||
| 38 | 5 | 4 | David Franco | 14.31 | ||
| 40 | 2 | 3 | Valdó Szücs | 14.32 | ||
| 40 | 1 | 7 | Javier Colomo | 14.32 | ||
| 40 | 8 | 6 | Marc José | 14.32 | ||
| 43 | 6 | 2 | Can Yıldırım | 14.36 | ||
| 44 | 4 | 6 | Mui Ching Yeung | 14.38 | ||
| 44 | 5 | 6 | Facundo Andrada | 14.38 | ||
| 46 | 4 | 5 | Gabriel Slythe-Léveillé | 14.40 | ||
| 46 | 7 | 2 | Rami Gharsali | 14.40 | ||
| 48 | 8 | 4 | Angus Julies | 14.41 | ||
| 49 | 3 | 4 | Zlatko Lefterov | 14.42 | ||
| 49 | 7 | 6 | Nader Ahmed Al-Haydar | 14.42 | ||
| 51 | 7 | 5 | Vitali Parakhonka | 14.47 | ||
| 52 | 2 | 8 | Stanislav Ostanin | 14.84 | ||
| 53 | 4 | 9 | FC Pieterse | 14.93 | ||
| 54 | 6 | 9 | Xaysa Anousone | 14.94 | PB | |
| 55 | 2 | 2 | Djanny Kina Sielele | 14.98 | ||
| 56 | 1 | 4 | Patricio Colarte | 15.89 | ||
| 4 | 7 | Martins Ogierakhi | ||||
| 7 | 3 | Ahmed Keswani |
Semi-Final
Qualification: The first 2 of each heat and the 2 fastest times qualified| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 2 | 4 | Yordan O'Farrill | 13.28 | Q | |
| 2 | 3 | 6 | Wilhem Belocian | 13.30 | Q, NJ | |
| 3 | 3 | 7 | James Gladman | 13.37 | Q | |
| 4 | 1 | 6 | Nicholas Hough | 13.49 | Q | |
| 5 | 2 | 6 | Shinya Tanaka | 13.61 | Q, PB | |
| 6 | 3 | 4 | Jussi Kanervo | 13.61 | q, NJ | |
| 7 | 2 | 7 | Chu Pengfei | 13.62 | q | |
| 8 | 1 | 7 | Dondre Echols | 13.71 | Q | |
| 9 | 3 | 8 | Joshua Thompson | 13.71 | ||
| 10 | 3 | 3 | Ruebin Walters | 13.73 | PB | |
| 11 | 2 | 8 | Cheng Yun-yin | 13.73 | ||
| 12 | 2 | 5 | Elmo Lakka | 13.74 | ||
| 13 | 2 | 9 | Yanick Hart | 13.76 | ||
| 14 | 1 | 4 | Jonas Christen | 13.76 | ||
| 15 | 2 | 2 | Calvin Arsenault | 13.84 | ||
| 16 | 1 | 3 | Kirill Nevdakh | 13.85 | ||
| 17 | 1 | 9 | Máté Gönczöl | 13.87 | ||
| 18 | 3 | 5 | Brahian Peña | 13.90 | ||
| 19 | 1 | 2 | Yaqoub Mohamed Al-Youha | 13.91 | ||
| 20 | 3 | 3 | Lucas Carvalho | 13.93 | ||
| 21 | 1 | 8 | Grzegorz Szade | 14.05 | ||
| 22 | 2 | 3 | Lorenzo Perini | 15.07 | ||
| – | 1 | 5 | Stefan Fennell | – | DSQ | |
| – | 3 | 9 | Supun Viraj Randeniya | – | DSQ |