East Gwillimbury is a town on the East Holland River in the Regional Municipality of York. It is part of the Greater Toronto Area of south-central Ontario, in Canada. It was formed by the amalgamation of the Township of East Gwillimbury with all the previously incorporated villages and hamlets within the township.
The main centres in East Gwillimbury are the villages of Holland Landing, Queensville, Sharon, and Mount Albert. The Civic Centre (municipal offices) are located along Leslie Street in Sharon. The northernmost interchange of Highway 404 is at the south edge of East Gwillimbury; though at present, is currently being extended north to Ravenshoe Road in Georgina along East Gwillimbury's most northern border.