Newtonville is a community located in the Municipality of Clarington, Ontario, Canada. It is located about 30 km E of Oshawa and about 10 km west of Port Hope on the former Highway 2.Newtonville is the most easterly community in Clarington (and in Durham Region) and was in the southeastern part of the old Clarke Township until 1973.Newtonville's first Post office opened in 1835 when the village was known as both "Clarke" (named after Clarke Township, which it was part of) and "Newton". It was located at the corner of Kingston Rd. (Highway 2) and the 8th Sideroad. The first Postmaster was Thomas Hymers, and the 1st mail carrier was John Carscadden, who carried mail from here to Kendal in 1857. The village had 8 Postmasters since the inception of the Post office. The last Postmistress was Joyce Carroll in 1991. At this time Canada Post's mandate was to close many of the smaller rural Post offices. Since then the village has been placed on a Rural Route delivery sorted in Port Hope. A retail postal outlet exists today at the store in the centre of Newtonville. The store was damaged by fire in 2008 and has since been rebuilt.On June 10, 1940, Norman McLeod Rogers, Minister of Defense and confidant to Prime Minister Mackenzie King, died in a plane crash near Newtonville en route from Ottawa to Toronto.