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.

Heats
Rule: The eight fastest teams advance to the final (Q).