La Vallee is a township in the Canadian province of Ontario, located within the Rainy River District.
La Vallee Township stretches for along the north side of the Rainy River, with a depth of , and consists of the geographic townships of Devlin, Burriss and Woodyatt.
The township includes the communities of:
In the 2021 Census of Population conducted by Statistics Canada, La Vallee had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021. The township's population of 938 in 2016 was down 5.1% from 2011.