The Women's 100 metres freestyle event at the 2002 Commonwealth Games took place 31 July-1 August.

The heats and the semi were held on 31 July, the final on 1 August.

Prior to this competition, the existing world record was as follows; The 16 fastest swimmers in the heats qualified for the semifinals.

[1] The eight fastest swimmers from the semifinals progressed to the final.

[2] The final was held on 1 August at 19:06.