Puslinch is a township in south-central Ontario, Canada, in Wellington County, south of Guelph. The area is rich in natural gas resources. The main source of production is agricultural, bottling and mining. Mining has been dominant throughout the county. About half of the township is forested, and a conservation area lies to the southwest. Near the western edge of the township, just outside of Cambridge, Ontario is Puslinch Lake, the largest kettle lake in North America. It is part of the Guelph census metropolitan area.The township was named after Puslinch House in Devon, England, where Elizabeth Yonge, the wife of Lieutenant Governor of Upper Canada Sir John Colborne, was born.