# Swimming at the 1984 Summer Olympics – Women's 4 × 100 metre medley relay

The final of the women's 4 × 100 metre medley relay event at the 1984 Summer Olympics was held in Los Angeles, California, on August 3, 1984.

## Records

Prior to this competition, the existing world and Olympic records were as follows.
| World record | East Germany (GDR) Ina Kleber (1:01.79) Ute Geweniger (1:09.16) Ines Geißler (1:00.09) Birgit Meineke (54.75) | 4:05.79 | Rome, Italy | 26 August 1983 |
| Olympic record | East Germany (GDR) Rica Reinisch (1:01.51) Ute Geweniger (1:09.46) Andrea Pollack (1:00.14) Caren Metschuck (55.56) | 4:06.67 | Moscow, Soviet Union | 20 July 1980 |

## Results
### Heats

Rule: The eight fastest teams advance to the final (Q).
| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | United States | Betsy Mitchell (1:02.56) Susan Rapp (1:11.49) Jenna Johnson (59.37) Carrie Steinseifer (55.81) | 4:09.23 | Q |
| 2 | 2 | 5 | West Germany | Svenja Schlicht (1:03.55) Ute Hasse (1:11.72) Ina Beyermann (1:01.91) Karin Seick (56.40) | 4:13.58 | Q |
| 3 | 1 | 5 | Canada | Reema Abdo (1:04.97) Anne Ottenbrite (1:11.72) Michelle MacPherson (1:02.31) Pamela Rai (56.70) | 4:15.70 | Q |
| 4 | 2 | 2 | Great Britain | Beverley Rose (1:04.81) Jean Hill (1:13.23) Nicola Fibbens (1:02.03) June Croft (56.76) | 4:16.83 | Q |
| 5 | 2 | 3 | Japan | Naomi Sekido (1:05.86) Hiroko Nagasaki (1:12.04) Naoko Kume (1:01.74) Kaori Yanase (57.95) | 4:17.59 | Q |
| 6 | 1 | 3 | Sweden | Anna-Karin Eriksson (1:05.33) Eva-Marie Håkansson (1:12.21) Agneta Eriksson (1:02.23) Maria Kardum (57.88) | 4:17.65 | Q |
| 7 | 1 | 6 | Italy | Manuela Carosi (1:05.08) Manuela Dalla Valle (1:11.80) Roberta Lanzarotti (1:03.56) Silvia Persi (57.46) | 4:17.90 | Q |
| 8 | 1 | 2 | Switzerland | Eva Gysling (1:05.80) Patricia Brülhart (1:12.67) Carole Brook (1:03.73) Marie-Thérèse Armentero (58.35) | 4:20.55 | Q |
| 9 | 1 | 7 | China | Guo Huaying (1:09.92) Liang Weifen (1:14.83) Li Jinlan (1:03.38) Ding Jilian (59.26) | 4:27.39 | |
| 10 | 1 | 1 | Hong Kong | Lotta Flink (1:09.78) Chow Lai Yee (1:19.45) Kathy Wong (1:06.70) Fenella Ng (1:02.69) | 4:38.62 | |
| | 1 | 4 | Netherlands | Jolanda de Rover (1:03.73) Petra van Staveren (1:10.58) Annemarie Verstappen (1:00.61) Desi Reijers | DSQ | |
| | 2 | 6 | Australia | Audrey Moore (1:04.61) Dimity Douglas (1:12.16) Lisa Curry (1:02.69) Angela Russell | DSQ | |
| | 2 | 7 | Mexico | Teresa Rivera (1:06.39) Sara Guido (1:14.97) Maria Urbina (1:06.75) Patricia Kohlmann | DSQ | |

### Final

| Rank | Lane | Nation | Swimmers | Time | Notes |
| | 4 | United States | Theresa Andrews (1:04.00) Tracy Caulkins (1:11.03) Mary T. Meagher (58.04) Nancy Hogshead (55.27) | 4:08.34 | |
| | 5 | West Germany | Svenja Schlicht (1:03.20) Ute Hasse (1:11.49) Ina Beyermann (1:01.27) Karin Seick (56.01) | 4:11.97 | NR |
| | 3 | Canada | Reema Abdo (1:04.19) Anne Ottenbrite (1:10.87) Michelle MacPherson (1:01.28) Pamela Rai (56.64) | 4:12.98 | NR |
| 4 | 6 | Great Britain | Beverley Rose (1:04.14) Jean Hill (1:12.00) Nicola Fibbens (1:01.83) June Croft (56.08) | 4:14.05 | |
| 5 | 1 | Italy | Manuela Carosi (1:05.48) Manuela Dalla Valle (1:11.32) Roberta Lanzarotti (1:03.50) Silvia Persi (57.10) | 4:17.40 | |
| 6 | 8 | Switzerland | Eva Gysling (1:05.61) Patricia Brülhart (1:12.59) Carole Brook (1:03.07) Marie-Thérèse Armentero (57.75) | 4:19.02 | |
| | 2 | Japan | Naomi Sekido (1:05.67) Hiroko Nagasaki (1:12.09) Naoko Kume Kaori Yanase | DSQ | |
| | 7 | Sweden | Anna-Karin Eriksson (1:05.70) Eva-Marie Håkansson Agneta Eriksson Maria Kardum | DSQ | |