A toise (; symbol: T) is a unit of measure for length, area and volume originating in pre-revolutionary France. In North America, it was used in colonial French establishments in early New France, French Louisiana (Louisiane), Acadia (Acadie) and Quebec. The related () was used in Portugal, Brazil, and other parts of the Portuguese Empire until the adoption of the metric system.
The name is derived from the Latin , meaning "outstretched arms".