Port Alberni is a city located on Vancouver Island in the province of British Columbia, Canada. The city lies within the Alberni Valley at the head of the Alberni Inlet, Vancouver Island's longest inlet. Port Alberni currently has a total population of 18,259. It is the location of the head offices of the Alberni-Clayoquot Regional District. Port Alberni is served by the coast-spanning Island Highway system, and a local airport. The principal industry is forestry products.