# Swimming at the 1972 Summer Olympics – Women's 100 metre butterfly

The women's 100 metre butterfly event at the 1972 Olympic Games took place between August 31 and September 1. This swimming event used the butterfly stroke. Because an Olympic size swimming pool is 50 metres long, this race consisted of two lengths of the pool.

## Medalists

| Gold | Mayumi Aoki Japan |
| Silver | Roswitha Beier East Germany |
| Bronze | Andrea Gyarmati Hungary |

## Results
### Heats

Heat 1
| Rank | Athlete | Country | Time | Notes |
| 1 | Dana Shrader | United States | 1:05.09 | Q |
| 2 | Edeltraud Koch | West Germany | 1:05.29 | Q |
| 3 | Frieke Buys | Netherlands | 1:06.89 | Q |
| 4 | Margrit Thomet | Switzerland | 1:07.28 | Q |
| 5 | Brenda McGrory | Ireland | 1:08.52 | |
| 6 | Donatella Talpo-Schiavon | Italy | 1:08.98 | |
| 7 | Susan Smith | Canada | 1:09.38 | |
| 8 | Norma Amezcua | Mexico | 1:12.23 | |
Heat 2
| Rank | Athlete | Country | Time | Notes |
| 1 | Andrea Gyarmati | Hungary | 1:04.01 | OR, Q |
| 2 | Roswitha Beier | East Germany | 1:04.34 | Q |
| 3 | Eva Wikner | Sweden | 1:06.70 | Q |
| 4 | Iryna Ustymenko | Soviet Union | 1:07.44 | Q |
| 5 | Aurora Chamorro | Spain | 1:08.39 | |
| 6 | Leslie Cliff | Canada | 1:09.29 | |
| 7 | Hsu Yue-yun | Chinese Taipei | 1:11.67 | |
Heat 3
| Rank | Athlete | Country | Time | Notes |
| 1 | Deena Deardurff | United States | 1:04.80 | Q |
| 2 | Rosemarie Kother-Gabriel | East Germany | 1:04.83 | Q |
| 3 | Noriko Asano | Japan | 1:04.97 | Q |
| 4 | Sue Funch | Australia | 1:07.51 | |
| 5 | Jean Jeavons | Great Britain | 1:07.64 | |
| 6 | Věra Faitlová | Czechoslovakia | 1:08.18 | |
| 7 | Tay Chin Joo | Singapore | 1:10.92 | |
| 8 | Susana Saxlund | Uruguay | 1:11.90 | |
Heat 4
| Rank | Athlete | Country | Time | Notes |
| 1 | Mayumi Aoki | Japan | 1:04.00 | OR, Q |
| 2 | Ellie Daniel | United States | 1:04.33 | Q |
| 3 | Gudrun Beckmann | West Germany | 1:05.26 | Q |
| 4 | Heike Nagel | West Germany | 1:05.64 | Q |
| 5 | Marilyn Corson | Canada | 1:06.26 | Q |
| 6 | Judit Turóczy | Hungary | 1:09.73 | |
| 7 | Ileana Morales | Venezuela | 1:10.37 | |

### Semifinals

Heat 1
| Rank | Athlete | Country | Time | Notes |
| 1 | Andrea Gyarmati | Hungary | 1:03.80 | Q, WR |
| 2 | Roswitha Beier | East Germany | 1:04.36 | Q |
| 3 | Dana Shrader | United States | 1:04.54 | Q |
| 4 | Rosemarie Kother | East Germany | 1:04.64 | |
| 5 | Edeltraud Koch | West Germany | 1:05.28 | |
| 6 | Frieke Buys | Netherlands | 1:06.78 | |
| 7 | Marilyn Corson | Canada | 1:06.78 | |
| 8 | Iryna Ustymenko | Soviet Union | 1:07.76 | |
Heat 2
| Rank | Athlete | Country | Time | Notes |
| 1 | Deena Deardurff | United States | 1:03.97 | Q |
| 2 | Mayumi Aoki | Japan | 1:04.11 | Q |
| 3 | Ellie Daniel | United States | 1:04.25 | Q |
| 4 | Gudrun Beckmann | West Germany | 1:04.52 | Q |
| 5 | Noriko Asano | Japan | 1:04.53 | Q |
| 6 | Heike Hustede | West Germany | 1:06.48 | |
| 7 | Margrit Thomet | Switzerland | 1:07.12 | |
| 8 | Eva Wikner | Sweden | 1:07.53 | |

### Final

| Rank | Athlete | Country | Time | Notes |
| | Mayumi Aoki | Japan | 1:03.34 | WR |
| | Roswitha Beier | East Germany | 1:03.61 | |
| | Andrea Gyarmati | Hungary | 1:03.73 | |
| 4 | Deena Deardurff | United States | 1:03.95 | |
| 5 | Dana Shrader | United States | 1:03.98 | |
| 6 | Ellie Daniel | United States | 1:04.08 | |
| 7 | Gudrun Beckmann | West Germany | 1:04.15 | |
| 8 | Noriko Asano | Japan | 1:04.25 | |
Key: OR = Olympic record