Athletics at the 2006 Commonwealth Games - Women's 400 metres

The women's 400 metres event at the 2006 Commonwealth Games was held on March 19–21.

Qualification: First 3 of each heat (Q) and the next 9 fastest (q) qualified for the semifinals.

Qualification: First 2 of each semifinal (Q) and the next 2 fastest (q) qualified for the final.