# Swimming at the 1984 Summer Olympics – Women's 100 metre backstroke

The final of the women's 100 metre backstroke event at the 1984 Summer Olympics was held in the McDonald's Olympic Swim Stadium in Los Angeles, California, on July 31, 1984.

## Records

Prior to this competition, the existing world and Olympic records were as follows.
| World record | Rica Reinisch (GDR) | 1:00.86 | Moscow, Soviet Union | 23 July 1980 |
| Olympic record | Rica Reinisch (GDR) | 1:00.86 | Moscow, Soviet Union | 23 July 1980 |

## Results
### Heats

Rule: The eight fastest swimmers advance to final A (Q), while the next eight to final B (q).
| Rank | Heat | Lane | Name | Nationality | Time | Notes |
| 1 | 2 | 4 | Betsy Mitchell | United States | 1:02.53 | Q |
| 2 | 1 | 4 | Theresa Andrews | United States | 1:02.94 | Q |
| 2 | 4 | 5 | Jolanda de Rover | Netherlands | 1:02.94 | Q |
| 4 | 4 | 2 | Beverley Rose | Great Britain | 1:03.61 | Q, NR |
| 5 | 4 | 4 | Carmen Bunaciu | Romania | 1:03.79 | Q |
| 6 | 2 | 5 | Svenja Schlicht | West Germany | 1:04.02 | Q |
| 7 | 3 | 4 | Anca Pătrășcoiu | Romania | 1:04.16 | Q |
| 8 | 1 | 3 | Brigitte van der Lans | Netherlands | 1:04.57 | QSO |
| 8 | 2 | 5 | Carmel Clark | New Zealand | 1:04.57 | QSO |
| 10 | 2 | 3 | Manuela Carosi | Italy | 1:04.77 | q |
| 11 | 3 | 5 | Georgina Parkes | Australia | 1:04.90 | q |
| 12 | 3 | 3 | Reema Abdo | Canada | 1:04.92 | q |
| 13 | 1 | 5 | Audrey Moore | Australia | 1:04.96 | q |
| 14 | 1 | 6 | Catherine White | Great Britain | 1:05.03 | q |
| 15 | 4 | 7 | Sabine Pauwels | Belgium | 1:05.17 | q |
| 16 | 3 | 6 | Eva Gysling | Switzerland | 1:05.18 | q |
| 17 | 3 | 2 | Sandra Dahlmann | West Germany | 1:05.27 | |
| 18 | 1 | 7 | Naomi Sekido | Japan | 1:05.60 | |
| 19 | 1 | 2 | Michelle MacPherson | Canada | 1:06.04 | |
| 20 | 4 | 6 | Anna-Karin Eriksson | Sweden | 1:06.09 | |
| 21 | 4 | 3 | Teresa Rivera | Mexico | 1:06.39 | |
| 22 | 2 | 6 | Yolande van der Straeten | Belgium | 1:07.07 | |
| 23 | 3 | 7 | Nozomi Sunouchi | Japan | 1:07.23 | |
| 24 | 2 | 7 | Choi Yun-hui | South Korea | 1:07.35 | |
| 25 | 3 | 1 | Guo Huaying | China | 1:08.21 | |
| 26 | 1 | 1 | Lotta Flink | Hong Kong | 1:09.70 | |
| 27 | 4 | 8 | Kathy Wong | Hong Kong | 1:10.19 | |
| 28 | 2 | 8 | Christine Jacob | Philippines | 1:10.28 | |
| 29 | 1 | 8 | Sharon Pickering | Fiji | 1:10.49 | |
| 30 | 2 | 1 | Petra Bekaert | Netherlands Antilles | 1:10.60 | |
| 31 | 3 | 8 | Helen Chow | Malaysia | 1:11.30 | |
| | 4 | 1 | Lise Lotte Nylund | Norway | DNS | |

#### Swimoff

| Rank | Lane | Name | Nationality | Time | Notes |
| 1 | 5 | Carmel Clark | New Zealand | 1:04.33 | Q, NR |
| 2 | 4 | Brigitte van der Lans | Netherlands | 1:04.82 | q |

### Finals
#### Final B

| Rank | Lane | Name | Nationality | Time |
| 9 | 2 | Audrey Moore | Australia | 1:04.15 |
| 10 | 5 | Manuela Carosi | Italy | 1:04.52 |
| 10 | 3 | Georgina Parkes | Australia | 1:04.52 |
| 12 | 4 | Brigitte van der Lans | Netherlands | 1:04.75 |
| 13 | 7 | Catherine White | Great Britain | 1:04.99 |
| 14 | 6 | Reema Abdo | Canada | 1:05.13 |
| 15 | 1 | Sabine Pauwels | Belgium | 1:05.33 |
| 16 | 8 | Eva Gysling | Switzerland | 1:06.11 |

#### Final A

| Rank | Lane | Name | Nationality | Time | Notes |
| | 3 | Theresa Andrews | United States | 1:02.55 | |
| | 4 | Betsy Mitchell | United States | 1:02.63 | |
| | 5 | Jolanda de Rover | Netherlands | 1:02.91 | |
| 4 | 2 | Carmen Bunaciu | Romania | 1:03.21 | |
| 5 | 1 | Anca Pătrășcoiu | Romania | 1:03.29 | |
| 6 | 7 | Svenja Schlicht | West Germany | 1:03.46 | NR |
| 7 | 6 | Beverley Rose | Great Britain | 1:04.16 | |
| 8 | 8 | Carmel Clark | New Zealand | 1:04.47 | |