The Regional District of Nanaimo is a regional district located on the eastern coast of Vancouver Island, British Columbia, Canada. It is bordered to the south by the Cowichan Valley Regional District, to the west by the Alberni-Clayoquot Regional District, and to the northwest by the Comox Valley Regional District. Its administration offices are located …The Regional District of Nanaimo is a regional district located on the eastern coast of Vancouver Island, British Columbia, Canada. It is bordered to the south by the Cowichan Valley Regional District, to the west by the Alberni-Clayoquot Regional District, and to the northwest by the Comox Valley Regional District. Its administration offices are located in Nanaimo. During the 2016 census, its population was established at 155,698.