Nanaimo Harbour (Port Code: CANNO), also known as the Port of Nanaimo, is a natural harbour on the east coast of Vancouver Island, British Columbia, Canada. The City of Nanaimo runs along the west side of the harbour. Three islands, Newcastle, Protection, and Gabriola, along with Duke Point, form the eastern edge. The port is under the management of the Nanaimo Port Authority. Nanaimo Harbour is serviced by several ferry terminals, two main highways, a Seaplane terminal, and a freight railway.
The Port of Nanaimo includes Departure Bay, the Inner Harbour, and Northumberland Channel, which is the body of water between Gabriola Island and Duke Point. The defined limits of the port run from Horsewell Bluffs at Stephenson Point, on the north-east shore of Departure Bay, to Malaspina Point on Gabriola Island. On the south end of Northumberland Channel, the harbour limits are Dodd Narrows and False Narrows at Mudge Island. The bay of Nanaimo Harbour itself, often called the Inner Harbour, is contained within the body of water between downtown Nanaimo, Newcastle Island, Protection Island, Gabriola Island, Duke Point, and the Nanaimo River estuary.