Alberni Valley is a broad valley located at the head of Alberni Inlet on Vancouver Island in British Columbia, Canada. It is home to Port Alberni, Sproat Lake and other outlining areas. The term is largely used as a synonym for Greater Port Alberni and adjoining communities but is used in a larger regional sense as well. Various local organizations and companies use the term "Alberni Valley" in their name, e.g. the Alberni Valley Times and Alberni Valley News newspapers the Alberni Valley Chamber of Commerce and the Alberni Valley Bulldogs minor hockey team. The Canadian pioneer, Joe Drinkwater lived in Alberni Valley during the late nineteenth and early twentieth centuries.

Vancouver Island is an island in the northeastern Pacific Ocean and part of the Canadian province of British Columbia. The island is 456 km (283 mi) in length, 100 km (62 mi) in width at its widest point, and 32,100 km2 (12,400 sq mi) in total area, while 31,285 km2 (12,079 sq mi) are of land. The island is the largest by area and the most populous along the west coasts of the Americas.