Coordinates: 35°00′S 138°30′E / 35°S 138.5°E Blackwood Valley is a wine region in the south-west of Western Australia, approximately 260 km (160 mi) south-south-east of Perth.
The region was named after the Blackwood River, the longest continually flowing river in Western Australia. The river passes through the towns of Bridgetown, Greenbushes, Nannup, Balingup and Boyup Brook within the region.
The Blackwood Valley region was settled in the late 1800s, and timber, horticulture, wool and other farming sustained the region. Blackwood Valley extends approximately to Geographe Bay in the west and north, Manjimup in the south, and Great Southern in the south-east.