A
- (Province of Isabela) Abuan
- (Province of Isabela) Aguinaldo
- (Province of Isabela) Alinam
- (Province of Nueva Vizcaya) Alimit
- (Province of Nueva Vizcaya) Abinganan
- (Province of Nueva Vizcaya) Aliaga
- (Province of Nueva Vizcaya) Antutot
- (Province of Nueva Vizcaya) Apean
- (Province of Nueva Vizcaya) Apayan
- (Province of Isabela) Ambatali
- (Province of Nueva Vizcaya) Arwas
- (Province of Isabela) Anonang
- (Province of Quirino) Aklan
- (Province of Quirino) Amogawen
- (Province of Nueva Vizcaya) Ampatleng
- (Province of Nueva Vizcaya) Ampakling
- (Province of Nueva Vizcaya) Acasia
- (Province of Cagayan) Anungu
- (Province of Isabela) Alicaocao
- (Province of Cagayan) Alitungtung
- (Province of Cagayan) Antiquity
- (Province of Cagayan) Abra
- (Province of Cagayan) Antiporda
- (Province of Isabela) Antonino
- (Province of Isabela) Ammugauan
- (Province of Isabela) Angoluan
- (Province of Isabela) Arellano
- (Province of Isabela) Alunan
- (Province of Cagayan) Ajat
- (Province of Isabela) Aga