# 2007 World Championships in Athletics – Women's 400 metres

The women's 400 metres at the 2007 World Championships in Athletics was held at the Nagai Stadium on 26, 27 and 29 August.

## Medalists

| Gold | Silver | Bronze |
| Christine Ohuruogu Great Britain | Nicola Sanders Great Britain | Novlene Williams Jamaica |

## Schedule

| Date | Time | Round |
| August 26, 2007 | 10:50 | Heats |
| August 27, 2007 | 21:10 | Semifinals |
| August 29, 2007 | 21:50 | Final |

## Results

| KEY: | q | Fastest non-qualifiers | Q | Qualified | WR | World record | AR | Area record | NR | National record | PB | Personal best | SB | Seasonal best |

### Heats

Qualification: First 4 in each heat (Q) and the next 4 fastest (q) advance to the semifinals.
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 4 | Novlene Williams | Jamaica | 50.21 | Q |
| 2 | 5 | Christine Ohuruogu | Great Britain | 50.46 | Q, SB |
| 3 | 5 | Ilona Usovich | Belarus | 50.53 | Q, NR |
| 4 | 4 | Ana Guevara | Mexico | 50.85 | Q |
| 5 | 1 | Natalya Antyukh | Russia | 50.88 | Q |
| 6 | 5 | Natasha Hastings | United States | 51.07 | Q |
| 7 | 1 | Mary Wineberg | United States | 51.25 | Q |
| 8 | 2 | DeeDee Trotter | United States | 51.27 | Q |
| 9 | 1 | Shereefa Lloyd | Jamaica | 51.42 | Q |
| 10 | 1 | Lee McConnell | Great Britain | 51.44 | Q, SB |
| 11 | 2 | Nicola Sanders | Great Britain | 51.45 | Q |
| 12 | 2 | Joanne Cuddihy | Ireland | 51.55 | Q, SB |
| 12 | 2 | Christine Amertil | Bahamas | 51.55 | Q |
| 14 | 4 | Ionela Târlea-Manolache | Romania | 51.59 | Q |
| 15 | 3 | Tatyana Veshkurova | Russia | 51.67 | Q |
| 16 | 3 | Shericka Williams | Jamaica | 51.72 | Q |
| 17 | 4 | Aymée Martínez | Cuba | 51.74 | Q, PB |
| 18 | 5 | Indira Terrero | Cuba | 51.76 | Q |
| 19 | 3 | Barbara Petráhn | Hungary | 51.86 | Q, SB |
| 20 | 3 | Amantle Montsho | Botswana | 51.87 | Q |
| 21 | 4 | Aliann Pompey | Guyana | 51.95 | q |
| 22 | 5 | Daniela Reina | Italy | 52.02 | q, SB |
| 23 | 4 | Christy Ekpukhon Ihunaegbo | Nigeria | 52.05 | q |
| 24 | 5 | Asami Tanno | Japan | 52.13 | q, SB |
| 25 | 2 | Zuzanna Radecka | Poland | 52.19 | |
| 26 | 4 | Makelesi Bulikiobo | Fiji | 52.23 | SB |
| 27 | 1 | Oksana Shcherbak | Ukraine | 52.39 | |
| 28 | 3 | Kineke Alexander | Saint Vincent and the Grenadines | 52.51 | |
| 29 | 2 | Folashade Abugan | Nigeria | 52.58 | |
| 30 | 5 | Gabriela Medina | Mexico | 53.16 | |
| 31 | 1 | Justine Bayigga | Uganda | 53.25 | |
| 32 | 2 | Maria Laura Almirão | Brazil | 53.68 | |
| 33 | 1 | Joy Eze | Nigeria | 53.83 | |
| 34 | 3 | Ginou Etienne | Haiti | 53.89 | |
| 35 | 4 | Solen Désert | France | 54.03 | |
| 36 | 1 | Olga Tereshkova | Kazakhstan | 54.09 | |
| 37 | 5 | Sandrine Thiébaud-Kangni | Togo | 54.11 | |
| 38 | 3 | Amy Mbacké Thiam | Senegal | 54.31 | |
| 39 | 2 | Hazel-Ann Regis | Grenada | 54.78 | SB |
| 40 | 3 | Nawal El Jack | Sudan | 55.29 | |
| 41 | 5 | Temalangeni Dlamini | Swaziland | 58.27 | PB |
| 42 | 2 | Vera Barbosa | Cape Verde | 58.56 | |

### Semifinals

First 2 in each semifinal(Q) and the next 2 fastest(q) advance to the final.
| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | 1 | Novlene Williams | Jamaica | 49.66 | Q, SB |
| 2 | 2 | Nicola Sanders | Great Britain | 49.77 | Q, PB |
| 3 | 2 | Natalya Antyukh | Russia | 49.93 | Q, SB |
| 4 | 3 | Christine Ohuruogu | Great Britain | 50.16 | Q, PB |
| 5 | 1 | Ana Guevara | Mexico | 50.19 | Q, SB |
| 6 | 3 | Mary Wineberg | United States | 50.27 | Q |
| 7 | 2 | DeeDee Trotter | United States | 50.31 | q |
| 7 | 1 | Ilona Usovich | Belarus | 50.31 | q, NR |
| 9 | 2 | Shericka Williams | Jamaica | 50.37 | SB |
| 10 | 3 | Tatyana Veshkurova | Russia | 50.71 | |
| 11 | 1 | Joanne Cuddihy | Ireland | 50.73 | NR |
| 12 | 3 | Amantle Montsho | Botswana | 50.90 | NR |
| 13 | 3 | Shereefa Lloyd | Jamaica | 51.00 | PB |
| 14 | 1 | Lee McConnell | Great Britain | 51.07 | SB |
| 15 | 1 | Indira Terrero | Cuba | 51.08 | |
| 16 | 2 | Christine Amertil | Bahamas | 51.18 | |
| 17 | 1 | Natasha Hastings | United States | 51.45 | |
| 18 | 3 | Christy Ekpukhon Ihunaegbo | Nigeria | 51.60 | |
| 19 | 3 | Ionela Târlea-Manolache | Romania | 51.62 | |
| 20 | 1 | Asami Tanno | Japan | 51.81 | SB |
| 21 | 2 | Daniela Reina | Italy | 51.99 | SB |
| 22 | 2 | Barbara Petráhn | Hungary | 52.12 | |
| 23 | 2 | Aliann Pompey | Guyana | 53.58 | |
| 24 | 3 | Aymée Martínez | Cuba | 57.77 | |

### Final

| Rank | Lane | Name | Nationality | Time | Notes |
| | 6 | Christine Ohuruogu | Great Britain | 49.61 | PB |
| | 4 | Nicola Sanders | Great Britain | 49.65 | PB |
| | 7 | Novlene Williams | Jamaica | 49.66 | SB |
| 4 | 9 | Ana Guevara | Mexico | 50.16 | SB |
| 5 | 8 | DeeDee Trotter | United States | 50.17 | |
| 6 | 5 | Natalya Antyukh | Russia | 50.33 | |
| 7 | 3 | Ilona Usovich | Belarus | 50.54 | |
| 8 | 2 | Mary Wineberg | United States | 50.96 | |