C
- (Province of Cagayan) Caballyal
- (Province of Cagayan) Cabaggaoan
- (Province of Nueva Vizcaya) Calitlitan
- (Province of Isabela) Callawan
- (Province of Cagayan) Catugan Norte
- (Province of Cagayan) Carunuan
- (Province of Isabela) Cabeseria Siete
- (Province of Isabela) Catanglan
- (Province of Isabela) Culasi
- (Province of Isabela) Centro Lual
- (Province of Isabela) Canarozo
- (Province of Isabela) Caddag
- (Province of Isabela) Casala
- (Province of Isabela) Cadsalan
- (Province of Cagayan) Calub
- (Province of Cagayan) Cagaman
- (Province of Cagayan) Calapawan
- (Province of Cagayan) Calaoaoan
- (Province of Cagayan) Capagaran
- (Province of Cagayan) Capalutan
- (Province of Cagayan) Cvac
- (Province of Cagayan) Callao Sur
- (Province of Cagayan) Cullit
- (Province of Cagayan) Calaoagan Bassit
- (Province of Cagayan) Calaoagan Dackel
- (Province of Cagayan) Capiddigan
- (Province of Cagayan) Cullit Sur
- (Province of Cagayan) Catangawan
- (Province of Cagayan) Cadalagan
- (Province of Cagayan) Calayan