Bolton (2011 population 25,954) is the most populous community in the town of Caledon, located in the Region of Peel, approximately 50 kilometres northwest of Toronto, in Ontario, Canada. In regional documents, it is referred to as a 'Rural Service Centre.' It has 26,478 residents in 8,721 households. The downtown and area that historically defined the village is in a valley, through which flows the Humber River.