Athletics at the 1948 Summer Olympics – Men's 4 × 400 metres relay

The men's 4 × 400 metres relay event at the 1948 Olympic Games took place on 6 and 7 August. The United States team won the final with a time of 3:10.4.

Records
Prior to the competition, the existing World and Olympic records were as follows.

Schedule
All times are British Summer Time (UTC+1)

Round 1
The first two teams in each heat qualified for the Final.

Heat 1

Heat 2

Heat 3

Final
Key: DNF = Did not finish