Georgina (Canada 2016 Census population 45,418) is a town in south-central Ontario, and the northernmost municipality in the Regional Municipality of York. The town is bounded to the north by Lake Simcoe. Although incorporated as a town, it operates as a township in which dispersed communities share a common administrative council. The largest communities are Keswick, Sutton and Jackson's Point. Smaller communities include Pefferlaw, Port Bolster, Roches Point, Udora and Willow Beach. The town was formed by the merger of the Village of Sutton, the Township of Georgina and the Township of North Gwillimbury in 1971 and incorporated in 1986. North Gwillimbury had previously been part of Georgina but became its own township in 1826. It took its name from the family of Elizabeth Simcoe, née "Gwillim".