I
- (Province of Cagayan) Iringan
- (Province of Cagayan) Imurong
- (Province of Nueva Vizcaya) Imugan
- (Province of Batanes) Imnaijbu
- (Province of Isabela) Imbiao
- (Province of Cagayan) Illuro
- (Province of Nueva Vizcaya) I-iyo
- (Province of Cagayan) Ibulo
- (Province of Isabela) Ibujan
- (Province of Batanes) Ibahos Island
- (Province of Batanes) Itbayat Island
- (Province of Isabela) Inanama
- (Province of Quirino) Ifugao Village
- (Province of Nueva Vizcaya) Igorot
- (Province of Nueva Vizcaya) Ingeron
- (Province of Quirino) Isidro Paredes
- (Province of Cagayan) Ignacio Jurado
- (Province of Nueva Vizcaya) Inaldo
- (Province of Batanes) Itbud
- (Province of Nueva Vizcaya) Itanga
- (Province of Cagayan) Isca
- (Province of Cagayan) Irao Island
- (Province of Cagayan) Iguican
- (Province of Isabela) Ipil
- (Province of Cagayan) Ipil
- (Province of Cagayan) Ipil
- (Province of Nueva Vizcaya) Ipang
- (Province of Nueva Vizcaya) Inuman
- (Province of Cagayan) Inuan
- (Province of Cagayan) Intal