C
- (Province of Pangasinan) Casantiagoan
- (Province of Pangasinan) Casantamarian
- (Province of Pangasinan) Casantacruzan
- (Province of La Union) Casantaan
- (Province of Pangasinan) Casanjuanan
- (Province of Pangasinan) Casanicolasan
- (Province of Pangasinan) Casanestebanan
- (Province of Pangasinan) Casabula
- (Province of Pangasinan) Carusocan
- (Province of La Union) Caarusipan
- (Province of Ilocos Norte) Carusipan
- (Province of Ilocos Sur) Caronoan
- (Province of Ilocos Norte) Caruan
- (Province of Ilocos Sur) Carmay
- (Province of La Union) Carmay
- (Province of Pangasinan) Carmay West
- (Province of Pangasinan) Carmay East
- (Province of Pangasinan) Carungay
- (Province of Pangasinan) Carlos
- (Province of La Union) Carlatan
- (Province of La Union) Carisquis
- (Province of Pangasinan) Caridad
- (Province of Ilocos Norte) Caribquib
- (Province of La Union) Cardis
- (Province of La Union) Carcooy
- (Province of La Union) Carcarmay
- (Province of Ilocos Sur) Carcarabasa
- (Province of Pangasinan) Carayungan
- (Province of Pangasinan) Carayacan
- (Province of Ilocos Norte) Caray