Swimming at the 1979 Pan American Games – Men's 4 × 100 metre medley relay

The men's 4 × 100 metre medley relay competition of the swimming events at the 1979 Pan American Games took place on 8 July at the Piscina Olimpica Del Escambron. The last Pan American Games champion was the United States.

Swimming at the 1979 Pan American Games – Men's 4 × 100 metre medley relay

The men's 4 × 100 metre medley relay competition of the swimming events at the 1979 Pan American Games took place on 8 July at the Piscina Olimpica Del Escambron. The last Pan American Games champion was the United States.