Cowichan /ˈkaʊ.wɪtʃən/ may refer either to:

• the Cowichan Tribes First Nation located in and around Duncan, British Columbia
• the Cowichan Valley, a region on Vancouver Island centred on Duncan, British Columbia, which contains:
  • Cowichan Valley Regional District, a supra-municipal regional government
  • Cowichan Lake, a 30 km long body of water
  • the town of Lake Cowichan
  • Cowichan River
  • Cowichan Bay, British Columbia, a bay and community.
• the Cowichan sweater, a heavy-wool knit animal and geometric patterns made by the women of the Cowichan people.

British Columbia provincial electoral districts

• Cowichan - 1871-1920
• Cowichan-Alberni, 1894 only
• Cowichan-Newcastle 1920 - 1963
• Cowichan-Malahat 1966-1986
• Cowichan-Ladysmith 1991–2005
• Nanaimo-North Cowichan 2009–present

Canadian federal electoral districts

• Cowichan—Malahat—The Islands 1976 - 1987
• Nanaimo—Cowichan 1987–2015
• Nanaimo—Cowichan—The Islands 1962 - 1976
• Cowichan—Malahat—Langford 2015-present

Other

• Cowichan Herald Extraordinary, one of the officers of arms at the Canadian Heraldic Authority

Transportation

• Cowichan, a steamship that operated in British Columbia from 1908 to 1925.
• HMCS Cowichan, the name of three vessels in the Canadian Navy;
  • HMCS Cowichan (J146), a Canadian Bangor-class minesweeper commissioned in 1941 and sold in 1946.
  • HMCS Cowichan (MCB 147), a Canadian Bay-class minesweeper commissioned in 1953 and sold to France in 1954.
  • HMCS Cowichan (MCB 162), a Canadian Bay-class minesweeper commissioned in 1957 and decommissioned in 1997 .