Browse Real Estate Listings in New Tecumseth, Ontario or list your own. Advertise, sell your property, list it for letNew Tecumseth is a town in Simcoe County, in south-central Ontario, Canada. While it is not officially a part of the Greater Toronto Area, it is counted, in terms of the census, as being a part of the Toronto Census Metropolitan Area.Source: https://en.wikipedia.org/