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
Schedule
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 and the next 4 fastest advance to the [|semifinals].| Rank | Heat | Name | Nationality | Time | Notes |
| 4 | Novlene Williams | 50.21 | Q | ||
| 5 | Christine Ohuruogu | 50.46 | Q, SB | ||
| 5 | Ilona Usovich | 50.53 | Q, NR | ||
| 4 | Ana Guevara | 50.85 | Q | ||
| 1 | Natalya Antyukh | 50.88 | Q | ||
| 5 | Natasha Hastings | 51.07 | Q | ||
| 1 | Mary Wineberg | 51.25 | Q | ||
| 2 | DeeDee Trotter | 51.27 | Q | ||
| 1 | Shereefa Lloyd | 51.42 | Q | ||
| 10 | 1 | Lee McConnell | 51.44 | Q, SB | |
| 11 | 2 | Nicola Sanders | 51.45 | Q | |
| 12 | 2 | Joanne Cuddihy | 51.55 | Q, SB | |
| 12 | 2 | Christine Amertil | 51.55 | Q | |
| 14 | 4 | Ionela Târlea-Manolache | 51.59 | Q | |
| 15 | 3 | Tatyana Veshkurova | 51.67 | Q | |
| 16 | 3 | Shericka Williams | 51.72 | Q | |
| 17 | 4 | Aymée Martínez | 51.74 | Q, PB | |
| 18 | 5 | Indira Terrero | 51.76 | Q | |
| 19 | 3 | Barbara Petráhn | 51.86 | Q, SB | |
| 20 | 3 | Amantle Montsho | 51.87 | Q | |
| 21 | 4 | Aliann Pompey | 51.95 | q | |
| 22 | 5 | Daniela Reina | 52.02 | q, SB | |
| 23 | 4 | Christy Ekpukhon Ihunaegbo | 52.05 | q | |
| 24 | 5 | Asami Tanno | 52.13 | q, SB | |
| 25 | 2 | Zuzanna Radecka | 52.19 | ||
| 26 | 4 | Makelesi Bulikiobo | 52.23 | SB | |
| 27 | 1 | Oksana Shcherbak | 52.39 | ||
| 28 | 3 | Kineke Alexander | 52.51 | ||
| 29 | 2 | Folashade Abugan | 52.58 | ||
| 30 | 5 | Gabriela Medina | 53.16 | ||
| 31 | 1 | Justine Bayigga | 53.25 | ||
| 32 | 2 | Maria Laura Almirão | 53.68 | ||
| 33 | 1 | Joy Eze | 53.83 | ||
| 34 | 3 | Ginou Etienne | 53.89 | ||
| 35 | 4 | Solen Désert | 54.03 | ||
| 36 | 1 | Olga Tereshkova | 54.09 | ||
| 37 | 5 | Sandrine Thiébaud-Kangni | 54.11 | ||
| 38 | 3 | Amy Mbacke Thiam | 54.31 | ||
| 39 | 2 | Hazel-Ann Regis | 54.78 | SB | |
| 40 | 3 | Nawal El Jack | 55.29 | ||
| 41 | 5 | Temalangeni Dlamini | 58.27 | PB | |
| 42 | 2 | Vera Barbosa | 58.56 |
Semifinals
First 2 in each semifinal and the next 2 fastest advance to the [|final].| Rank | Heat | Name | Nationality | Time | Notes |
| 1 | Novlene Williams | 49.66 | Q, SB | ||
| 2 | Nicola Sanders | 49.77 | Q, PB | ||
| 2 | Natalya Antyukh | 49.93 | Q, SB | ||
| 3 | Christine Ohuruogu | 50.16 | Q, PB | ||
| 1 | Ana Guevara | 50.19 | Q, SB | ||
| 3 | Mary Wineberg | 50.27 | Q | ||
| 2 | DeeDee Trotter | 50.31 | q | ||
| 1 | Ilona Usovich | 50.31 | q, NR | ||
| 2 | Shericka Williams | 50.37 | SB | ||
| 10 | 3 | Tatyana Veshkurova | 50.71 | ||
| 11 | 1 | Joanne Cuddihy | 50.73 | NR | |
| 12 | 3 | Amantle Montsho | 50.90 | NR | |
| 13 | 3 | Shereefa Lloyd | 51.00 | PB | |
| 14 | 1 | Lee McConnell | 51.07 | SB | |
| 15 | 1 | Indira Terrero | 51.08 | ||
| 16 | 2 | Christine Amertil | 51.18 | ||
| 17 | 1 | Natasha Hastings | 51.45 | ||
| 18 | 3 | Christy Ekpukhon Ihunaegbo | 51.60 | ||
| 19 | 3 | Ionela Târlea-Manolache | 51.62 | ||
| 20 | 1 | Asami Tanno | 51.81 | SB | |
| 21 | 2 | Daniela Reina | 51.99 | SB | |
| 22 | 2 | Barbara Petráhn | 52.12 | ||
| 23 | 2 | Aliann Pompey | 53.58 | ||
| 24 | 3 | Aymée Martínez | 57.77 |
Final
| Rank | Lane | Name | Nationality | Time | Notes |
| 6 | Christine Ohuruogu | 49.61 | PB | ||
| 4 | Nicola Sanders | 49.65 | PB | ||
| 7 | Novlene Williams | 49.66 | SB | ||
| 4 | 9 | Ana Guevara | 50.16 | SB | |
| 5 | 8 | DeeDee Trotter | 50.17 | ||
| 6 | 5 | Natalya Antyukh | 50.33 | ||
| 7 | 3 | Ilona Usovich | 50.54 | ||
| 8 | 2 | Mary Wineberg | 50.96 |