S
- St. George
- (Saint John County) St. Martins
- Saint-Louis de Kent
- (Northumberland County) Sevogle
- (Gloucester County) South Tetagouche
- (Madawaska County) Saint-François-de-Madawaska
- (Gloucester County) Saint-Léolin
- (Gloucester County) Sainte-Marie-Saint-Raphaël
- (Gloucester County) Savoy Landing
- (Gloucester County) Sainte Rosette
- (Gloucester County) Sainte-Louise
- (Gloucester County) Salmon Beach
- (Gloucester County) Sormany
- (Gloucester County) Saint-Amateur
- (Gloucester County) Saint-Irénée
- (Gloucester County) Stonehaven
- (Gloucester County) Six Roads
- (Gloucester County) Sainte Rose
- (Madawaska County) Saint-Jacques
- (Madawaska County) Sainte-Anne-de-Madawaska
- (Carleton County) South Johnville
- (Carleton County) South Ridge
- (Carleton County) Stickney
- (Carleton County) Somerville
- (Carleton County) Strong Corner
- (Carleton County) South Gordonsville
- (Carleton County) South Knowlesville
- (Carleton County) South Greenfield
- (Carleton County) Speerville
- (Kent County) Saint-Louis de Kent