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

The final of the women's 100 metre butterfly event at the 1984 Summer Olympics was held in the McDonald's Olympic Swim Stadium in Los Angeles, California, on August 2, 1984.

## Records

Prior to this competition, the existing world and Olympic records were as follows.
| World record | Mary T. Meagher (USA) | 57.93 | Brown Deer, United States | 16 August 1981 |
| Olympic record | Kornelia Ender (GDR) | 1:00.13 | Montreal, Canada | 22 July 1976 |
The following records were established during the competition:
| Date | Round | Name | Nation | Time | Record |
| 2 August | Heat 4 | Mary T. Meagher | United States | 59.05 | OR |

## 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 | 4 | 4 | Mary T. Meagher | United States | 59.05 | Q, OR |
| 2 | 5 | 4 | Jenna Johnson | United States | 59.99 | Q |
| 3 | 5 | 5 | Annemarie Verstappen | Netherlands | 1:01.50 | Q |
| 4 | 3 | 5 | Michelle MacPherson | Canada | 1:01.57 | Q |
| 5 | 4 | 5 | Janet Tibbits | Australia | 1:01.97 | Q |
| 6 | 2 | 5 | Conny van Bentum | Netherlands | 1:02.01 | Q |
| 7 | 2 | 4 | Karin Seick | West Germany | 1:02.21 | Q |
| 8 | 3 | 6 | Ina Beyermann | West Germany | 1:02.36 | Q |
| 9 | 1 | 4 | Lisa Curry-Kenny | Australia | 1:02.47 | q |
| 10 | 1 | 5 | Kiyomi Takahashi | Japan | 1:02.79 | q |
| 11 | 2 | 3 | Agneta Eriksson | Sweden | 1:02.97 | q |
| 12 | 4 | 3 | Nicola Fibbens | Great Britain | 1:02.98 | q |
| 13 | 5 | 3 | Ann Osgerby | Great Britain | 1:03.09 | q |
| 14 | 1 | 3 | Anna Doig | New Zealand | 1:03.15 | q |
| 15 | 4 | 6 | Sonja Hausladen | Austria | 1:03.20 | q |
| 16 | 3 | 4 | Takemi Ise | Japan | 1:03.37 | q |
| 17 | 1 | 6 | Agneta Mårtensson | Sweden | 1:03.84 | |
| 17 | 3 | 3 | Marie Moore | Canada | 1:03.84 | |
| 19 | 3 | 2 | Roberta Lanzarotti | Italy | 1:03.88 | |
| 20 | 4 | 2 | Li Jinlan | China | 1:03.97 | |
| 21 | 5 | 6 | Carole Brook | Switzerland | 1:03.99 | |
| 22 | 2 | 6 | Shelley Cramer | Virgin Islands | 1:04.43 | |
| 23 | 2 | 2 | Brigitte Wanderer | Austria | 1:05.22 | |
| 24 | 5 | 2 | Cristina Quintarelli | Italy | 1:05.35 | |
| 25 | 3 | 7 | Faten Ghattas | Tunisia | 1:05.91 | |
| 26 | 4 | 7 | Karin Brandes | Peru | 1:05.96 | |
| 27 | 2 | 7 | Julie Parkes | Ireland | 1:06.20 | |
| 28 | 5 | 1 | María Urbina | Mexico | 1:06.65 | |
| 29 | 5 | 7 | Jodie Lawaetz | Virgin Islands | 1:06.82 | |
| 30 | 4 | 1 | Blanca Morales | Guatemala | 1:06.99 | |
| 31 | 1 | 7 | Kathy Wong | Hong Kong | 1:07.25 | |
| 32 | 3 | 1 | Nevine Hafez | Egypt | 1:10.45 | |
| 33 | 2 | 1 | Karen Slowing-Aceituno | Guatemala | 1:10.68 | |
| 34 | 1 | 1 | Sharon Pickering | Fiji | 1:11.49 | |
| 35 | 5 | 8 | Daniela Galassi | San Marino | 1:06.82 | |
| | 1 | 2 | Hadar Rubinstein | Israel | DNS | |

### Finals
#### Final B

| Rank | Lane | Name | Nationality | Time | Notes |
| 9 | 4 | Lisa Curry-Kenny | Australia | 1:01.25 | |
| 10 | 6 | Nicola Fibbens | Great Britain | 1:01.48 | NR |
| 11 | 5 | Kiyomi Takahashi | Japan | 1:02.55 | |
| 12 | 3 | Agneta Eriksson | Sweden | 1:02.64 | |
| 13 | 2 | Ann Osgerby | Great Britain | 1:02.98 | |
| 14 | 8 | Takemi Ise | Japan | 1:03.33 | |
| 15 | 1 | Sonja Hausladen | Austria | 1:03.37 | |
| 16 | 7 | Anna Doig | New Zealand | 1:03.65 | |

#### Final A

| Rank | Lane | Name | Nationality | Time |
| | 4 | Mary T. Meagher | United States | 59.26 |
| | 5 | Jenna Johnson | United States | 1:00.19 |
| | 1 | Karin Seick | West Germany | 1:01.36 |
| 4 | 3 | Annemarie Verstappen | Netherlands | 1:01.56 |
| 5 | 6 | Michelle MacPherson | Canada | 1:01.58 |
| 6 | 2 | Janet Tibbits | Australia | 1:01.78 |
| 7 | 7 | Conny van Bentum | Netherlands | 1:01.94 |
| 8 | 8 | Ina Beyermann | West Germany | 1:02.11 |