C
- (Province of Ilocos Norte) Capalngan
- (Province of La Union) Capacoan
- (Province of Ilocos Norte) Capac cuan
- (Province of Ilocos Norte) Capacacan
- (Province of Ilocos Sur) Caoayan
- (Province of Pangasinan) Caoayan
- (Province of Ilocos Sur) Canuguan
- (Province of Ilocos Sur) Canteng
- (Province of Ilocos Norte) Caniogan
- (Province of Ilocos Sur) Caniogan
- (Province of Ilocos Sur) Cangao
- (Province of Pangasinan) Cangaluyan Island
- (Province of Ilocos Sur) Candelaria
- (Province of La Union) Candanglaan
- (Province of Pangasinan) Canarvacanan
- (Province of La Union) Canaoay
- (Province of Pangasinan) Camp One
- (Province of Pangasinan) Camp Gregg
- (Province of Ilocos Sur) Camindoroan
- (Province of La Union) Camiling
- (Province of Pangasinan) Cambuca
- (Province of La Union) Cambali
- (Province of Pangasinan) Camantiles
- (Province of La Union) Camansi
- (Province of Ilocos Norte) Camangaan
- (Province of Ilocos Norte) Camangaan
- (Province of Ilocos Sur) Camangaan
- (Province of Ilocos Norte) Camanga
- (Province of Ilocos Norte) Comandingan
- (Province of Pangasinan) Camanang