# 2012 World Junior Championships in Athletics – Men's 100 metres

The men's 100 metres at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 10 and 11 July.

## Medalists

| Gold | Adam Gemili Great Britain |
| Silver | Aaron Ernest United States |
| Bronze | Odean Skeen Jamaica |

## Records

Standing records prior to the 2012 World Junior Championships in Athletics :
| World Junior Record | Darrel Brown (TRI) | 10.01 | Paris, France | 24 August 2003 |
| World Junior Record | Jeff Demps (USA) | 10.01 | Eugene, United States | 28 June 2008 |
| Championship Record | Darrel Brown (TRI) | 10.09 | Kingston, Jamaica | 17 July 2002 |
| World Junior Leading | Adam Gemili (GBR) | 10.08 | Regensburg, Germany | 2 June 2012 |
| Broken records during the 2012 World Junior Championships in Athletics |||||
| Championship Record & World Junior Leading | Adam Gemili (GBR) | 10.05 | Barcelona, Spain | 11 July 2012 |

## Results
### Heats

Qualification: The first 2 of each heat (Q) and the 6 fastest times (q) qualified
| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 2 | 5 | Adam Gemili | Great Britain | 10.37 | Q |
| 2 | 5 | 2 | Tyreek Hill | United States | 10.37 | Q |
| 3 | 7 | 7 | Aaron Ernest | United States | 10.39 | Q |
| 4 | 4 | 4 | Carlos Nascimento | Portugal | 10.43 | Q, PB |
| 5 | 8 | 9 | Jazeel Murphy | Jamaica | 10.45 | Q |
| 6 | 4 | 9 | Hassan Taftian | Iran | 10.48 | Q |
| 7 | 7 | 9 | Chijindu Ujah | Great Britain | 10.48 | Q |
| 8 | 3 | 3 | Zharnel Hughes | Anguilla | 10.50 | Q |
| 9 | 9 | 5 | Odean Skeen | Jamaica | 10.50 | Q |
| 10 | 6 | 4 | Kazuma Oseto | Japan | 10.50 | Q |
| 11 | 7 | 8 | Cejhae Greene | Antigua and Barbuda | 10.52 | q |
| 12 | 8 | 5 | Patrick Domogala | Germany | 10.56 | Q |
| 13 | 6 | 9 | Hugh Donovan | Australia | 10.57 | Q |
| 14 | 9 | 9 | Kazuki Kanamori | Japan | 10.57 | Q, PB |
| 15 | 1 | 3 | Teray Smith | Bahamas | 10.58 | Q |
| 16 | 3 | 2 | Yousef Ali Al-Shalani | Saudi Arabia | 10.59 | Q |
| 17 | 9 | 2 | Fana Mofokeng | South Africa | 10.59 | q |
| 18 | 1 | 9 | Giovanni Galbieri | Italy | 10.60 | Q |
| 19 | 1 | 7 | Siphelo Ngquboza | South Africa | 10.60 | Q |
| 20 | 6 | 2 | Devon Rittinger | Canada | 10.62 | q |
| 21 | 9 | 4 | Eetu Rantala | Finland | 10.64 | q |
| 22 | 8 | 8 | Ben Jaworski | Australia | 10.65 | q |
| 23 | 1 | 5 | Titus Kafunda | Zambia | 10.67 | |
| 24 | 2 | 4 | Zhenye Xie | China | 10.68 | Q |
| 25 | 5 | 3 | Mobolade Ajomale | Canada | 10.68 | Q |
| 26 | 4 | 5 | Robert Polkowski | Germany | 10.68 | |
| 27 | 4 | 8 | Abdelghani Zghali | Morocco | 10.68 | |
| 28 | 2 | 2 | Mike Mokamba Nyang'Au | Kenya | 10.70 | |
| 29 | 9 | 6 | Héctor Ruiz | Mexico | 10.70 | |
| 30 | 5 | 9 | Tahir Walsh | Antigua and Barbuda | 10.71 | |
| 31 | 5 | 5 | Pierre Chalus | France | 10.72 | |
| 32 | 6 | 3 | Jonathan Holder | Trinidad and Tobago | 10.73 | |
| 33 | 8 | 7 | Denis Ogarkov | Russia | 10.73 | |
| 34 | 2 | 9 | Khalfani Muhammad | Puerto Rico | 10.76 | |
| 35 | 1 | 4 | Rodrigo Rocha | Brazil | 10.78 | |
| 36 | 7 | 6 | Yuri Monteiro | Brazil | 10.78 | |
| 37 | 9 | 8 | Marek Bakalár | Czech Republic | 10.78 | |
| 38 | 8 | 6 | Anthony Farrington | Bahamas | 10.78 | |
| 39 | 3 | 4 | Artur Bruno Rojas | Bolivia | 10.80 | |
| 40 | 6 | 6 | J'maal Alexander | British Virgin Islands | 10.80 | NJR |
| 41 | 6 | 5 | Hensley Paulina | Netherlands | 10.81 | |
| 42 | 7 | 5 | Aleksandr Eliseev | Russia | 10.83 | |
| 43 | 4 | 3 | Ashron Sobers | Trinidad and Tobago | 10.84 | |
| 44 | 8 | 3 | Dumisani Bhebhe | Zimbabwe | 10.84 | |
| 45 | 5 | 7 | Mateo Edward | Panama | 10.86 | |
| 46 | 7 | 3 | Georgy Gusto | France | 10.87 | |
| 47 | 3 | 7 | Andy Martínez | Peru | 10.88 | |
| 48 | 1 | 2 | Eid Abdulla Al-Kuwari | Qatar | 10.95 | |
| 49 | 6 | 8 | César Ramírez | Mexico | 10.97 | |
| 50 | 2 | 8 | Kamil Bijowski | Poland | 10.99 | |
| 51 | 2 | 1 | Kodi Harman | New Zealand | 10.99 | |
| 52 | 3 | 9 | Volodymyr Suprun | Ukraine | 11.00 | |
| 53 | 1 | 6 | Ali Omar Abdulla Al Doseri | Bahrain | 11.02 | SB |
| 54 | 5 | 8 | Zdenek Stromšík | Czech Republic | 11.02 | |
| 55 | 7 | 1 | Fiacre Bahorou | Benin | 11.05 | |
| 56 | 3 | 5 | Yanis Dallay | Comoros | 11.07 | PB |
| 57 | 9 | 7 | Davron Atabaev | Tajikistan | 11.11 | |
| 58 | 5 | 4 | Adrián Pérez | Spain | 11.18 | |
| 59 | 6 | 7 | Yang Zi Xian | Macau | 11.24 | |
| 60 | 2 | 6 | A. Kumara Makkawitaliyanage | Sri Lanka | 11.32 | |
| 61 | 7 | 4 | Siueni Filimone | Tonga | 11.41 | PB |
| 62 | 9 | 3 | Samuel Olo Manel | Equatorial Guinea | 11.46 | PB |
| 63 | 4 | 6 | Md Ariful Islam | Bangladesh | 11.48 | PB |
| 64 | 3 | 6 | Archel Evrard Biniakounou | Republic of the Congo | 11.49 | PB |
| 65 | 5 | 6 | Muhammad Sajid | Pakistan | 11.76 | PB |
| 66 | 7 | 2 | Nicholas Chianese | San Marino | 11.76 | PB |
| 67 | 2 | 3 | George Manebona | Solomon Islands | 11.78 | PB |
| 68 | 8 | 2 | Elama Fa’atonu | American Samoa | 11.90 | PB |
| 69 | 2 | 7 | Sidney Quaresma | São Tomé and Príncipe | 11.96 | PB |
| 70 | 1 | 8 | Andre Lopes de Pina | Guinea-Bissau | 12.02 | PB |
| 71 | 8 | 4 | Daniel Philimon | Vanuatu | 13.31 | SB |
| – | 3 | 8 | Tamunotonye Briggs | Nigeria | – | DNS |
| – | 4 | 2 | Okeudo Jonathan Nmaju | Nigeria | – | DNS |
| – | 4 | 7 | Oumar Diallo | Guinea | – | DNS |

### Semifinal

Qualification: The first 2 of each heat (Q) and the 2 fastest times (q) qualified
| Rank | Heat | Lane | Name | Nationality | Time | Note |
| 1 | 2 | 5 | Adam Gemili | Great Britain | 10.18 | Q |
| 2 | 3 | 6 | Aaron Ernest | United States | 10.21 | Q |
| 3 | 1 | 5 | Tyreek Hill | United States | 10.25 | Q |
| 4 | 1 | 6 | Jazeel Murphy | Jamaica | 10.25 | Q, PB |
| 5 | 1 | 4 | Chijindu Ujah | Great Britain | 10.40 | q, PB |
| 6 | 3 | 5 | Carlos Nascimento | Portugal | 10.42 | Q, PB |
| 7 | 3 | 7 | Odean Skeen | Jamaica | 10.43 | q |
| 8 | 1 | 7 | Teray Smith | Bahamas | 10.44 | |
| 9 | 3 | 4 | Hassan Taftian | Iran | 10.46 | |
| 10 | 1 | 9 | Siphelo Ngquboza | South Africa | 10.47 | |
| 11 | 3 | 8 | Giovanni Galbieri | Italy | 10.48 | PB |
| 12 | 2 | 9 | Zhenye Xie | China | 10.54 | Q |
| 13 | 1 | 3 | Cejhae Greene | Antigua and Barbuda | 10.55 | |
| 14 | 2 | 4 | Patrick Domogala | Germany | 10.55 | |
| 15 | 2 | 6 | Zharnel Hughes | Anguilla | 10.55 | |
| 16 | 2 | 7 | Kazuma Oseto | Japan | 10.56 | |
| 17 | 2 | 2 | Mobolade Ajomale | Canada | 10.56 | PB |
| 18 | 3 | 9 | Yousef Ali Al-Shalani | Saudi Arabia | 10.57 | PB |
| 19 | 1 | 7 | Kazuki Kanamori | Japan | 10.63 | |
| 20 | 2 | 8 | Hugh Donovan | Australia | 10.65 | |
| 21 | 3 | 3 | Devon Rittinger | Canada | 10.65 | |
| 22 | 2 | 3 | Ben Jaworski | Australia | 10.68 | |
| 23 | 3 | 2 | Fana Mofokeng | South Africa | 10.69 | |
| 24 | 1 | 2 | Eetu Rantala | Finland | 10.73 | |

### Final

Wind: +0.1 m/s
| Rank | Lane | Name | Nationality | Time | Note |
| | 6 | Adam Gemili | Great Britain | 10.05 | WJL, CR |
| | 7 | Aaron Ernest | United States | 10.17 | PB |
| | 3 | Odean Skeen | Jamaica | 10.28 | PB |
| 4 | 4 | Tyreek Hill | United States | 10.29 | |
| 5 | 5 | Jazeel Murphy | Jamaica | 10.29 | |
| 6 | 2 | Chijindu Ujah | Great Britain | 10.39 | PB |
| 7 | 9 | Carlos Nascimento | Portugal | 10.41 | PB |
| 8 | 8 | Zhenye Xie | China | 10.59 | |

## Participation

According to an unofficial count, 71 athletes from 55 countries participated in the event.
* American Samoa (1)
* Anguilla (1)
* Antigua and Barbuda (2)
* Australia (2)
* Bahamas (2)
* Bahrain (1)
* Bangladesh (1)
* Benin (1)
* Bolivia (1)
* Brazil (2)
* British Virgin Islands (1)
* Canada (2)
* China (1)
* Comoros (1)
* Congo (1)
* Czech Republic (2)
* Equatorial Guinea (1)
* Finland (1)
* France (2)
* Germany (2)
* Guinea-Bissau (1)
* Iran (1)
* Italy (1)
* Jamaica (2)
* Japan (2)
* Kenya (1)
* Macau (1)
* Mexico (2)
* Morocco (1)
* Netherlands (1)
* New Zealand (1)
* Pakistan (1)
* Panama (1)
* Peru (1)
* Poland (1)
* Portugal (1)
* Puerto Rico (1)
* Qatar (1)
* Russia (2)
* San Marino (1)
* São Tomé and Príncipe (1)
* Saudi Arabia (1)
* Solomon Islands (1)
* South Africa (2)
* Spain (1)
* Sri Lanka (1)
* Tajikistan (1)
* Tonga (1)
* Trinidad and Tobago (2)
* Ukraine (1)
* United Kingdom (2)
* United States (2)
* Vanuatu (1)
* Zambia (1)
* Zimbabwe (1)