C
- (Province of Cagayan) Cambabangan
- (Province of Isabela) Camasi
- (Province of Isabela) Camarunggayan
- (Province of Cagayan) Camarugan
- (Province of Isabela) Camarag
- (Province of Cagayan) Camannawan
- (Province of Isabela) Camaal
- (Province of Isabela) Calumangan
- (Province of Nueva Vizcaya) Calso
- (Province of Nueva Vizcaya) Calomingan
- (Province of Quirino) Calogo
- (Province of Cagayan) Callungan
- (Province of Isabela) Cal-lering
- (Province of Cagayan) Callao
- (Province of Cagayan) Callao
- (Province of Isabela) Callao
- (Province of Nueva Vizcaya) Calittacan
- (Province of Isabela) Calinaoan Sur
- (Province of Isabela) Calimaturod
- (Province of Isabela) Caliguian
- (Province of Isabela) Calicocohan
- (Province of Isabela) Calibabagan
- (Province of Nueva Vizcaya) Caliat
- (Province of Isabela) Cali
- (Province of Cagayan) Calenao
- (Province of Cagayan) Calayan Island
- (Province of Cagayan) Calayán
- (Province of Cagayan) Calapian
- (Province of Cagayan) Calapangan
- (Province of Cagayan) Calapangan Sur