A
- (Province of Nueva Vizcaya) Alayan
- (Province of Isabela) Allangigan
- (Province of Nueva Vizcaya) Alang
- (Province of Nueva Vizcaya) Alang
- (Province of Cagayan) Alabiao
- (Province of Cagayan) Ajjao
- (Province of Cagayan) Aguzzao
- (Province of Cagayan) Agusi
- (Province of Cagayan) Aguiguican
- (Province of Cagayan) Aguanta
- (Province of Cagayan) Aggungan
- (Province of Cagayan) Aggunetan
- (Province of Cagayan) Aggunetan
- (Province of Cagayan) Agguirit
- (Province of Isabela) Aggub
- (Province of Nueva Vizcaya) Aggub
- (Province of Isabela) Aggassian
- (Province of Isabela) Aggasian
- (Province of Cagayan) Agcanni
- (Province of Cagayan) Agani
- (Province of Cagayan) Afusing Daga
- (Province of Cagayan) Afusing Bato
- (Province of Isabela) Adiao
- (Province of Nueva Vizcaya) Addalem
- (Province of Isabela) Addalam
- (Province of Cagayan) Adaoag
- (Province of Batanes) Achichok Island
- (Province of Isabela) Acacia
- (Province of Nueva Vizcaya) Abuyo
- (Province of Nueva Vizcaya) Abuyo