COBOURG, the capital of Northumberland county, Ontario, Canada, on Lake Ontario and the Canadian National and Canadian Pacific railways, Tom. E.N.E. of Toronto. Pop. 5,834. It has a large, safe harbour, and steamboat communication with St. Lawrence and Lake Ontario ports, and is connected by ferry with Charlotte, New York. It contains car-works, foundries, and carpet and woollen factories, and is a summer resort, especially for Amer icans. Victoria university, formerly situated here, was removed to Toronto in 189o.