| Final 19:25 | time | L | | 1. Jearl Miles-Clark |  USA | 49.82s | 6 | | 2. Natasha Kaiser-Brown | USA | 50.17s | 3 | | 3. Sandie Richards |  JAM | 50.44s | 4 | | 4. Tatyana Alekseyeva |  RUS | 50.52s | 5 | | 5. Ximena Restrepo |  COL | 50.91s | 2 | | 6. Sandra Myers |  ESP | 51.22s | 1 | | 7. Juliet Campbell | JAM | 51.40s | 7 | | -. Norfalia Carabali | COL | DQ | 8 |
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| Semi 1 19.40h | time | L | | 1. Natasha Kaiser-Brown | USA | 50.41s | 3 | | 2. Tatyana Alekseyeva | RUS | 50.49s | 4 | | 3. Juliet Campbell | JAM | 50.89s | 5 | | 4. Norfalia Carabali | COL | 51.17s | 6 | | 5. Aelita Yurchenko |  UKR | 51.55s | 7 | | 6. Inez Turner | JAM | 52.25s | 8 | | 7. Anja Rucker |  GER | 52.32s | 2 | | 8. Aissatou Tandian |  SEN | 52.77s | 1 |
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| Semi 2 19.47h | time | L | | 1. Jearl Miles-Clark | USA | 50.45s | 5 | | 2. Sandie Richards | JAM | 50.65s | 4 | | 3. Sandra Myers | ESP | 50.83s | 3 | | 4. Ximena Restrepo | COL | 50.89s | 6 | | 5. Yelena Ruzina | RUS | 51.14s | 8 | | 6. Linda Keough |  GBR | 52.56s | 2 | | 7. Michele Collins | USA | 52.60s | 7 | | 8. Francine Landre |  FRA | 52.72s | 1 |
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| Heat 1 11.00h | time | L | | 1. Tatyana Alekseyeva | RUS | 50.88s | 8 | | 2. Sandie Richards | JAM | 51.01s | 3 | | 3. Nadezda Kostovalova |  CZE | 52.69s | 7 | | 4. Elsa Devassoigne | FRA | 52.81s | 6 | | 5. Regula Zurcher-Scalabrin |  SUI | 52.84s | 5 | | 6. Guilhermina Da Cruz |  ANO | 55.34s | 4 | | 7. Nadjina Kaltouma |  CHA | 59.76s | 2 |
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| Heat 2 11.07h | time | L | | 1. Natasha Kaiser-Brown | USA | 51.80s | 1 | | 2. Yelena Ruzina | RUS | 52.23s | 4 | | 3. Linda Keough | GBR | 52.61s | 2 | | 4. Dora Kyriakou |  CYP | 54.49s | 6 | | 5. Lorie Ann Adams |  GUY | 55.54s | 5 | | 6. Shermaine Ross |  GRN | 55.80s | 8 | | 7. Yaznee Nasheeda |  MLD | 1:07.87 | 3 | | -. Nve Ruth Mangue |  GEQ | DNS | 7 |
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| Heat 3 11.14h | Team ~$Time | L | | 1. Ximena Restrepo | COL | 51.59s | 4 | | 2. Sandra Myers | ESP | 51.77s | 6 | | 3. Aelita Yurchenko | UKR | 52.22s | 3 | | 4. Noodang Phimphoo |  THA | 54.01s | 7 | | 5. Denise Ouabangui |  CAF | 57.18s | 5 | | 6. Lasnet Nkouka |  CGO | 57.95s | 8 | | -. Grace Birungi |  UGA | DNS | 2 |
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| Heat 4 11.21h | time | L | | 1. Norfalia Carabali | COL | 51.65s | 7 | | 2. Juliet Campbell | JAM | 51.76s | 4 | | 3. Michele Collins | USA | 52.03s | 8 | | 4. Aissatou Tandian | SEN | 52.59s | 3 | | 5. Yana Burtasenkova |  MOL | 53.12s | 5 | | 6. Manda Kanoute |  MLI | 55.72s | 6 | | 7. Rachelle Godonou |  BEN | 1:03.39 | 2 |
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| Heat 5 11.28h | time | L | | 1. Jearl Miles-Clark | USA | 51.24s | 8 | | 2. Inez Turner | JAM | 52.04s | 7 | | 3. Anja Rucker | GER | 52.10s | 2 | | 4. Francine Landre | FRA | 52.53s | 5 | | 5. Camille Noel |  CAN | 53.11s | 4 | | 6. Mary-Estelle Kapalu |  VAN | 56.06s | 1 | | 7. Mirna El-Laz |  LIB | 59.76s | 3 | | -. Lyudmila Dzhigalova | UKR | DNS | 6 |
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