Maskinongé is a regional county municipality in the Mauricie region of Quebec, Canada. The seat is Louiseville. It is located adjacent on the west of Trois-Rivières on the Saint Lawrence River.

The population according to the 2016 Canadian Census was 36,316, an increase of 0.1% over the 2011 population.

The RCM was formed on January 1, 1982, and it consisted of Hunterstown Township (now part of Saint-Paulin); Belleau Municipality (now part of Saint-Alexis-des-Monts); the parish municipalities of Saint-Alexis-des-Monts, Sainte-Angèle (since renamed to Sainte-Angèle-de-Premont), Sainte-Anne-d'Yamachiche (now part of Yamachiche), Saint-Antoine-de-la-Rivière-du-Loup (now part of Louiseville), Saint-Barnabé, Saint-Édouard (since renamed to Saint-Édouard-de-Maskinongé), Saint-Joseph-de-Maskinongé (now part of Maskinongé), Saint-Justin, Saint-Léon-le-Grand, Saint-Paulin, Saint-Sévère, and Sainte-Ursule; and the village municipalities of Louiseville, Maskinongé, Saint-Paulin, and Yamachiche.

On January 1, 2002, the municipalities of Charette, Saint-Boniface-de-Shawinigan (since renamed to Saint-Boniface), Saint-Élie (since renamed to Saint-Élie-de-Caxton), Saint-Étienne-des-Grès, and Saint-Mathieu-du-Parc were transferred to the Maskinongé Regional County Municipality when the Centre-de-la-Mauricie and Francheville Regional Counties were dissolved.

There are 17 subdivisions within the RCM:

Highways and numbered routes that run through the municipality, including external routes that start or finish at the county border:

• List of regional county municipalities and equivalent territories in Quebec