A
- (Province of Isabela) Abulan
- (Province of Cagayan) Abolo
- (Province of Quirino) Abolan
- (Province of Nueva Vizcaya) Abian-Abian Junction
- (Province of Nueva Vizcaya) Abian
- (Province of Isabela) Abbuatan
- (Province of Cagayan) Abbey Sur
- (Province of Cagayan) Abbeg
- (Province of Isabela) Ambatuan
- (Province of Cagayan) Abanqueruan
- (Province of Quirino) Abbag
- (Province of Quirino) Abbag
- (Province of Cagayan) Abarriongan
- (Province of Cagayan) Abagao
- (Province of Cagayan) Abagao
- (Province of Cagayan) Abaca
- (Province of Nueva Vizcaya) Abaca
- (Province of Nueva Vizcaya) Abaca
- (Province of Cagayan) Allotan
- (Province of Isabela) Ankalasag
- (Province of Isabela) Ayud
- (Province of Cagayan) Afunan Cabayu
- (Province of Cagayan) Alaguia
- (Province of Cagayan) Alucao
- (Province of Cagayan) Aridawen
- (Province of Cagayan) Anipan
- (Province of Cagayan) Angagan
- (Province of Cagayan) Agutan
- (Province of Cagayan) Arenaya
- (Province of Isabela) Ara