Mansewood is an unincorporated community in Halton Hills, Ontario, Canada. Middle Sixteen Mile Creek flows through the settlement. The early settlement was part of The Scotch Block, a large agricultural area in Esquesing Township occupied primarily by Scottish immigrants.

History

A cemetery is located west of the settlement and contains a grave dating to 1815. Mansewood had a post office from 1877 to 1914. In 1889, Owen Robertson, a farmer from Mansewood, was noted for the exceptional growth of his Prize Cluster Oats, an experimental variety. Robertson produced 59 kg of oats from just 1.4 kg of seed.