Cowichan Valley on Vancouver Island.

Cowichan Valley is a region around the Cowichan River and Cowichan Lake on Vancouver Island, in British Columbia, Canada. There is some debate as to the origin of the name Cowichan, which many believe to be an anglicized form of the First Nations tribal name Quw'utsun. This word in turn may be derived from Hul'qumi'num, meaning "warming your back against the sun." Others have claimed that the name means "warm land". Cowichan Valley has a population of approximately 80,000.

Duncan has a population of less than 5000, however, it serves as the Cowichan Valley commerce centre.

Communities include Duncan, Lake Cowichan, Cobble Hill, Shawnigan Lake, Mill Bay, Ladysmith, Crofton, Chemainus, Honeymoon Bay and Maple Bay.

The valley is the home of a growing number of Cowichan vineyards and wineries. They include Cherry Point Vineyards, Blue Grouse, Glenterra,Vigneti Zanatta, Venturi-Schulze Vineyards, and Averil Creek. Locals claim that the warm, dry summers and mild, moist winters are reminiscent of a cool Mediterranean climate, providing ideal growing conditions for many grape varieties.

Golf is also popular on Vancouver Island. Visit the golf courses of the Cowichan Valley.

The Trans Canada Trail goes through the Valley, and there are numerous options for hiking enthusiasts.

The railroad serves the Cowichan Valley as does the Trans-Canada Highway. The valley is central to both Victoria to the south and Nanaimo to the north.

Duncan BC has a large First Nations community and is the traditional home of the Cowichan Tribes, who are the largest band among the Coast Salish people. The Coast Salish women of the Cowichan Tribes are makers of the world famous Cowichan Sweaters.