There is also a Port Maitland in the province of Nova Scotia; see Port Maitland, Nova Scotia. Port Maitland is a community of approximately 100 people in Haldimand County, Ontario, Canada. It is on the North shore of Lake Erie at the mouth of the Grand River. At one time a canal connected the Welland Canal to the Grand River. It was once a thriving commercial fishing village. The population of Port Maitland is.