Georgina is a town in south-central Ontario, and the northernmost municipality in the Regional Municipality of York and therefore the Greater Toronto Area. 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, Udora and Willow Beach.