​OSHAWA, a manufacturing town and port of entry of Ontario county, Ontario, Canada, on Lake Ontario and the Grand Trunk railway, 30 m. E.N.E. of Toronto. Pop. (1901) 4304. It contains flour, woollen and grist-mills, piano, farm implement and carriage factories, foundries, tanneries, canning factories, &c. There are a ladies’ college and good schools.