# 2012 World Junior Championships in Athletics – Women's 4 × 100 metres relay

The women's 4 × 100 metres relay at the 2012 World Junior Championships in Athletics was held at the Estadi Olímpic Lluís Companys on 13 and 14 July.

## Medalists

| Gold | Silver | Bronze |
| United States Morgan Snow Dezerea Bryant Jennifer Madu Shayla Sanders | Germany Alexandra Burghardt Ida Mayer Katharina Grompe Jessie Maduka | Brazil Camila de Souza Tamiris de Liz Nathalia da Rosa Jéssica Carolina dos Reis |

## Records

Prior to the competition, the existing world junior and championship records were as follows.
| World Junior Record | United States Blue (Bianca Knight, Jeneba Tarmoh, Elizabeth Olear, Gabrielle Mayo) | 43.29 | Eugene, OR, United States | 8 August 2006 |
| Championship Record | Jamaica (Sherone Simpson, Kerron Stewart, Anneisha McLaughlin, Simone Facey) | 43.40 | Kingston, Jamaica | 21 July 2002 |
| World Junior Leading | United States Young Achievers A (Keana Gray, Tristie Johnson, Shayla Sanders, Kali Davis-White) | 44.39 | Orlando, FL, United States | 26 May 2012 |
| Broken records during the 2012 World Junior Championships in Athletics |||||
| World Junior Leading | United States (Morgan Snow, Dezerea Bryant, Jennifer Madu, Shayla Sanders) | 43.89 | Barcelona, Spain | 14 July 2012 |

## Results
### Heats

Qualification: First 2 of each heat (Q) plus the 2 fastest times (q) qualified
| Rank | Heat | Lane | Nation | Athletes | Time | Notes |
| 1 | 1 | 7 | United States | Morgan Snow, Kali Davis-White, Jennifer Madu, Shayla Sanders | 43.95 | Q, WJL |
| 2 | 3 | 7 | Germany | Alexandra Burghardt, Ida Mayer, Katharina Grompe, Jessie Maduka | 44.27 | Q, SB |
| 3 | 2 | 4 | Great Britain | Annie Tagoe, Hannah Thomas, Rachel Johncock, Sophie Papps | 44.47 | Q, SB |
| 4 | 3 | 6 | Nigeria | Josephine Ada Omaka, Wisdom Isoken, Goodness Thomas, Stephanie Kalu | 44.58 | Q, SB |
| 5 | 1 | 4 | Netherlands | Miquella Lobo, Tessa van Schagen, Naomi Sedney, Marloes Duijn | 44.68 | Q, SB |
| 6 | 2 | 7 | Brazil | Thais Vides, Tamiris de Liz, Nathalia da Rosa, Camila de Souza | 44.79 | Q, SB |
| 7 | 2 | 8 | Belgium | Orphée Depuydt, Camille Laus, Imke Vervaet, Justien Grillet | 44.88 | q, NJ |
| 8 | 3 | 4 | Poland | Zuzanna Kalinowska, Katarzyna Sokólska, Angelika Stępień, Kamila Ciba | 45.02 | q, SB |
| 9 | 3 | 5 | Italy | Elisa Paiero, Irene Siragusa, Anna Bongiorni, Udochi Ekeh | 45.15 | SB |
| 10 | 3 | 8 | Switzerland | Nora Frey, Sara Atcho, Charlène Keller, Samantha Dagry | 45.61 | |
| | 1 | 8 | Australia | Carla Williams, Monica Brennan, Ella Nelson, Ashleigh Whittaker | DQ | |
| | 2 | 3 | Canada | Clémence Paiement, Khamica Bingham, Isatu Fofanah, Shai-Anne Davis | DQ | |
| | 2 | 5 | Spain | Cristina Lara, Paula Llistosella, Sonia Molina-Prados, María Isabel Pérez | DQ | |
| | 3 | 3 | South Africa | Chante van Tonder, Philippa van der Merwe, Zanri van der Merwe, Nabeela Parker | DQ | |
| | 1 | 5 | Bahamas | Devynne Charlton, Carmiesha Cox, Rashan Brown, Anthonique Strachan | DNF | |
| | 2 | 6 | Jamaica | Monique Spencer, Shawnette Lewin, Christania Williams, Deandre Whitehorne | DNF | |
| | 1 | 6 | Slovenia | Laura Strajnar, Kaja Debevec, Tina Slejko, Maja Petrovic | DNF | |
| | 1 | 3 | China | | DNS | |

### Final

| Rank | Lane | Nation | Athletes | Time | Notes |
| | 9 | United States | Morgan Snow, Dezerea Bryant, Jennifer Madu, Shayla Sanders | 43.89 | WJL |
| | 6 | Germany | Alexandra Burghardt, Ida Mayer, Katharina Grompe, Jessie Maduka | 44.24 | SB |
| | 3 | Brazil | Camila de Souza, Tamiris de Liz, Nathalia da Rosa, Jéssica Carolina dos Reis | 44.29 | SB |
| 4 | 1 | Poland | Zuzanna Kalinowska, Katarzyna Sokólska, Angelika Stępień, Kamila Ciba | 44.95 | SB |
| 5 | 2 | Belgium | Orphée Depuydt, Camille Laus, Imke Vervaet, Justien Grillet | 45.12 | |
| 6 | 7 | Netherlands | Miquella Lobo, Tessa van Schagen, Naomi Sedney, Marloes Duijn | 45.22 | |
| | 8 | Great Britain | Dina Asher-Smith, Rachel Johncock, Desiree Henry, Sophie Papps | DNF | |
| | 5 | Nigeria | Josephine Ada Omaka, Wisdom Isoken, Goodness Thomas, Stephanie Kalu | DQ | |

## Participation

According to an unofficial count, 72 athletes from 17 countries participated in the event.
* Australia (4)
* Bahamas (4)
* Belgium (4)
* Brazil (5)
* Canada (4)
* Germany (4)
* Italy (4)
* Jamaica (4)
* Netherlands (4)
* Nigeria (4)
* Poland (4)
* Slovenia (4)
* South Africa (4)
* Spain (4)
* Switzerland (4)
* United Kingdom (6)
* United States (5)