C
- (Province of Pangasinan) Cabitaogan
- (Province of Pangasinan) Calomboyan
- (Province of Ilocos Norte) Camcamirang
- (Province of Ilocos Norte) Calungbayan
- (Province of Ilocos Norte) Caestebanan
- (Province of Ilocos Norte) Cadaanan
- (Province of Pangasinan) Calaocan
- (Province of Pangasinan) Cadanglaan
- (Province of Pangasinan) Calapugan
- (Province of Pangasinan) Canarem
- (Province of Pangasinan) Cacandungan
- (Province of Pangasinan) Camanawanaan
- (Province of Ilocos Norte) Camayeng
- (Province of Ilocos Norte) Capurpuraoan
- (Province of Pangasinan) Cagcan
- (Province of Ilocos Norte) Calsit
- (Province of Ilocos Norte) Coaoacan
- (Province of Ilocos Sur) Candalican
- (Province of Ilocos Sur) Cabiotan
- (Province of Ilocos Sur) Calumbaya
- (Province of Ilocos Sur) Comandancia
- (Province of Ilocos Norte) Cada-anan
- (Province of Pangasinan) Capataan
- (Province of Pangasinan) Cacaritan
- (Province of Ilocos Sur) Casilagan Sur
- (Province of Pangasinan) Consolacion
- (Province of Pangasinan) Carusocan Sur
- (Province of Ilocos Sur) Caloang
- (Province of Ilocos Sur) Catib
- (Province of Ilocos Sur) Caparacadan