The women's 400 metre freestyle competition at the 2002 Pan Pacific Swimming Championships took place on 25 August at the Yokohama International Swimming Pool.

[1][2] The last champion was Brooke Bennett of US.

[3] This race consisted of eight lengths of the pool, with all eight being in the freestyle stroke.

[4] Prior to this competition, the existing world and Pan Pacific records were as follows: All times are in minutes and seconds.

[1] The final was held on 25 August.