S
- (Province of La Union) Saytan
- (Province of La Union) Say-oan
- (Province of Ilocos Norte) Saud
- (Province of Ilocos Norte) Saud
- (Province of La Union) Sauay
- (Province of Pangasinan) Sasabuculen
- (Province of La Union) Sasaba
- (Province of Ilocos Sur) Sarmingan
- (Province of La Union) Saracat
- (Province of Ilocos Norte) Sappiguit
- (Province of Pangasinan) Sapinit
- (Province of La Union) Sapilang
- (Province of La Union) Sapilang
- (Province of Ilocos Sur) Sapang
- (Province of Pangasinan) Sapang
- (Province of Pangasinan) Sapang
- (Province of Pangasinan) Sapang
- (Province of Pangasinan) Sapang
- (Province of Pangasinan) Sapang
- (Province of Pangasinan) Sapa Grande
- (Province of Pangasinan) Sapa Pequeña
- (Province of La Union) Saoay
- (Province of Pangasinan) Saoat
- (Province of Ilocos Norte) Saoang
- (Province of Ilocos Sur) Saoang
- (Province of Ilocos Sur) San Vicente
- (Province of Ilocos Sur) San Vicente
- (Province of La Union) San Vicente
- (Province of La Union) San Vicente Sur
- (Province of Pangasinan) San Vicente