Dorset is a small community located on the boundary between the Lake of Bays Municipality in Muskoka District and the Algonquin Highlands Township in Haliburton County, Ontario, Canada. Dorset was originally called Cedar Narrows. In 1859 Francis Harvey became the first European settler here. Zachariah Cole mapped out the area for the government around 1860. The community name was chosen by some of the settlers that came from Dorset, England.