Swimming at the 1936 Summer Olympics – Women's 400 metre freestyle

The competition was held from Thursday to Saturday, 13 to 15 August 1936.

Twenty swimmers from ten nations competed.

Ragnhild Hveger set a new Olympic record in the first heat with 5:28.0 minutes.

In the final Rie Mastenbroek bettered the Olympic record with 5:26.4 minutes.

As both fourth placed swimmers set the same time both advanced to the final.