Swimming at the 1980 Summer Olympics – Women's 4 × 100 metre medley relay
The women's 4 × 100 metre medley relay event at the 1980 Summer Olympics was held on 20 July at the Swimming Pool at the Olimpiysky Sports Complex.
Records
Prior to this competition, the existing world and Olympic records were as follows.The following records were established during the competition:
| Date | Event | Name | Nationality | Time | Record |
| 20 July | Final | Rica Reinisch Ute Geweniger Andrea Pollack Caren Metschuck | 4:06.67 | , |