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.Results
Heats
Rule: The eight fastest teams advance to the final.| Rank | Heat | Lane | Nation | Swimmers | Time | Notes |
| 1 | 2 | 4 | Betsy Mitchell Susan Rapp Jenna Johnson Carrie Steinseifer | 4:09.23 | Q | |
| 2 | 2 | 5 | Svenja Schlicht Ute Hasse Ina Beyermann Karin Seick | 4:13.58 | Q | |
| 3 | 1 | 5 | Reema Abdo Anne Ottenbrite Michelle MacPherson Pamela Rai | 4:15.70 | Q | |
| 4 | 2 | 2 | Beverley Rose Jean Hill Nicola Fibbens June Croft | 4:16.83 | Q | |
| 5 | 2 | 3 | Naomi Sekido Hiroko Nagasaki Naoko Kume Kaori Yanase | 4:17.59 | Q | |
| 6 | 1 | 3 | Anna-Karin Eriksson Eva-Marie Håkansson Agneta Eriksson Maria Kardum | 4:17.65 | Q | |
| 7 | 1 | 6 | Manuela Carosi Manuela Dalla Valle Roberta Lanzarotti Silvia Persi | 4:17.90 | Q | |
| 8 | 1 | 2 | Eva Gysling Patricia Brülhart Carole Brook Marie-Thérèse Armentero | 4:20.55 | Q | |
| 9 | 1 | 7 | Guo Huaying Liang Weifen Li Jinlan Ding Jilian | 4:27.39 | ||
| 10 | 1 | 1 | Lotta Flink Chow Lai Yee Kathy Wong Fenella Ng | 4:38.62 | ||
| 1 | 4 | Jolanda de Rover Petra van Staveren Annemarie Verstappen Desi Reijers | ||||
| 2 | 6 | Audrey Moore Dimity Douglas Lisa Curry Angela Russell | ||||
| 2 | 7 | Teresa Rivera Sara Guido Maria Urbina Patricia Kohlmann |