The Fifth Woman (original: Den femte kvinnan; 1996) is a crime novel by Swedish author Henning Mankell, the sixth in his acclaimed Inspector Wallander series.

A sadistic serial killer has been preying on men, beginning with a retired car salesman whose interests appear to be limited to bird watching and poetry and whose body was discovered in a punji stick pit; and continuing with a flower shop manager, found starved and garrotted in the woods.

Wallander soon realises both men have a past record of violence towards women, and after another man is drowned in a lake, he goes on the hunt for an avenging angel...

In 2002, The Fifth Woman was adapted by Swedish public broadcaster Sveriges Television into a four-part television miniseries, starring Rolf Lassgård as Wallander.

British broadcaster BBC commissioned a 90-minute adaptation for its Wallander television series starring Kenneth Branagh.