Saint-Isidore (French pronunciation: [sɛ̃t‿izidɔʁ]) is a geographic parish in Gloucester County, New Brunswick, Canada.

[4] Prior to the 2023 governance reform, the Hautes-Terres portion was divided between the village of Saint-Isidore[5] and the local service district of the parish of Saint-Isidore[a], which further included the special service area of Bois-Blanc - Hacheyville - Duguayville.

[8] In 1947, the western end of Saint-Isidore was included in the newly erected Allardville Parish.

[10][11][12] bold indicates an incorporated municipality Bodies of water[b] at least partly within the parish.

[10][11][12] Parish population total does not include village of Saint-Isidore and portion within Regional Municipality of Tracadie Population trend[13][14][15] Mother tongue (2016)[15]