NOTOC There is more than one place called Oakville: Australia Oakville (New South Wales), a suburb of Sydney. Canada Oakville (Ontario) - A town in Ontario. United States of America Oakville (Alabama) - A town in Alabama. Oakville (California) - A town in Napa Valley in California. Oakville (Maryland) - A town in Maryland. Oakville (Missouri) - an unincorporated suburb of St. Louis, Missouri. Oakville (Washington) - A town in Grays Harbor County, Washington.