C
- (Province of Cagayan) Casili
- (Province of Isabela) Catabban
- (Province of Isabela) Cabeseria Diecisiete y Veintiuno
- (Province of Isabela) Centro - San Antonio
- (Province of Cagayan) Calamagui
- (Province of Isabela) Cabeseria Veintitrés
- (Province of Cagayan) Cato
- (Province of Nueva Vizcaya) Cabalatan
- (Province of Isabela) Caralucud
- (Province of Cagayan) Cabaoan
- (Province of Isabela) Cutug
- (Province of Nueva Vizcaya) Cutug
- (Province of Nueva Vizcaya) Curifang
- (Province of Nueva Vizcaya) Curasay
- (Province of Isabela) Curag
- (Province of Isabela) Cumu
- (Province of Cagayan) Cumao
- (Province of Cagayan) Cullit
- (Province of Cagayan) Culling
- (Province of Isabela) Culalabat
- (Province of Isabela) Culior
- (Province of Isabela) Culing Centro
- (Province of Isabela) Culing East
- (Province of Cagayan) Culao
- (Province of Isabela) Cubag
- (Province of Cagayan) Cruz
- (Province of Cagayan) Cordova
- (Province of Cagayan) Cordinian
- (Province of Isabela) Consular
- (Province of Nueva Vizcaya) Consuelo