Chalk River (2016 population: 1029)[1] is a community located within the town of Laurentian Hills in Renfrew County, Ontario, Canada.

[2] Chalk River's area is environmentally pristine with extensive forests, hills and numerous small lakes, all of which support a variety of wildlife typical to the southern edge of the Canadian Shield.

The only traditional truck stop-style restaurant, the Treetop, was lost in February 2019 to a roof collapse and remains to be demolished or rebuilt.

The Chalk River library, the Lions Hall, and the Legion all play an important part in the community.

Chalk River played an increasingly important role in settlement of the Upper Ottawa Valley after a Canadian Pacific Railway line was constructed through the area.