Innisfil is a town in Ontario, Canada, located on the western shore of Lake Simcoe in Simcoe County, immediately south of Barrie and 80 kilometres (50 mi) north of Toronto. It has historically been a rural area, but due to being geographically sandwiched in between the high-growth areas of Barrie area and York Region has meant greater residential development in Innisfil.

The history of Innisfil spans a period in excess of 170 years. The Town was hewn from almost unbroken virgin forests which had been home to the Huron Indians, and was first surveyed in 1820. The area encompassed 68,653 acres (278 km²), including the villages of Allandale, Tollendal, Painswick, Minets Point, and Holly at the time.

The first settlers were the Hewson and Soules families who came by way of the East Holland River and Lake Simcoe to settle at Point Endeavour; they renamed the area Hewson's Point (later named Big Bay Point). The Hewsons settled on March 30, 1820, and the Soules in 1822. The Warnica family settled the following year, in 1823, in the area now known as Painswick. The first sawmill in the Township was built at Tollendal by George McMullen in 1829. At this time James Soules owned a sawmill on the south half of lot 26 concession fourteen (Big Bay Point), Innisfil where he made the lumber for the construction of the first frame house in Innisfil for Lewis J. Clement.