Mansewood is an unincorporated community in Halton Hills, Ontario, Canada.

[1] 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.

[2] A cemetery is located west of the settlement and contains a grave dating to 1815.

[4] In 1889, Owen Robertson, a farmer from Mansewood, was noted for the exceptional growth of his Prize Cluster Oats, an experimental variety.