Trois-Rives (French pronunciation: [tʁwa ʁiv]) is a municipality with an area of 675 square kilometres (261 sq mi) located in Mékinac Regional County Municipality, in the Mid-Mauricie, province of Quebec, Canada.

[1] On August 28, 2004, Trois-Rives was enlarged by some 70 square kilometres (27 sq mi) when it annexed a portion of the Lac-Masketsi Unorganized Territory.

Generally, each route is designated as the place name of the headwater lake that feeds it: It is bounded on the west by the Saint-Maurice River, and includes the communities of Grande-Anse, Olscamps, Rivière-Matawin, Saint-Joseph-de-Mékinac, and partially Rivière-aux-Rats.

In the 2022 Quebec general election the incumbent MNA Marie-Louise Tardif, of the Coalition Avenir Québec, was re-elected to represent the population of Trois-Rives in the National Assembly of Quebec.

In the 2021 Canadian federal election, the incumbent François-Philippe Champagne of the Liberal Party was re-elected to represent the population Trois-Rives in the House of Commons of Canada.