2016 FINA World Swimming Championships (25 m) – Women's 400 metre freestyle

The Women's 400 metre freestyle competition of the 2016 FINA World Swimming Championships (25 m) was held on 9 December 2016.

Records
Prior to the competition, the existing world and championship records were as follows.

Heats
The heats were held at 10:25.

Final
The final was held at 19:16.