Marrinup is a rural locality and former town in the Peel region of Western Australia between Dwellingup and Pinjarra.

[6] Little remains of the town other than an old bridge over Marrinup Creek and some wooden railway sleepers.

A 4.5-kilometre (2.8 mi) walk trail from the townsite to the remains of a defunct Prisoner of War camp.

[6] After 1930, the townsite had become abandoned[6] as a result of a decline in timber resources and milling operations being moved to Dwellingup.

[7][4] The Marrinup Cycle Trail, an 8-kilometre (5.0 mi) looped mountain bike track also starts and finishes from the eastern side of the townsite.