Athletics at the 1986 Commonwealth Games – Women's 400 metres hurdles

The women's 400 metres hurdles event at the 1986 Commonwealth Games was held on 27 and 28 July at the Meadowbank Stadium in Edinburgh.

The winning margin was 1.61 seconds which as of 2024 remains the only time the women's 400 metres hurdles was won by more than 1.4 seconds at these games.

Heats
Qualification: First 3 of each heat (Q) and the next 2 fastest (q) qualified for the final.