M
- (Province of Pangasinan) Masiling
- (Province of Ilocos Norte) Malituek
- (Province of Ilocos Sur) Maruya Este
- (Province of Pangasinan) Mulog
- (Province of Pangasinan) Muelang
- (Province of Ilocos Norte) Morong
- (Province of Pangasinan) Moreno
- (Province of Ilocos Sur) Montero
- (Province of Ilocos Norte) Monte
- (Province of Pangasinan) Monang
- (Province of Ilocos Sur) Mission
- (Province of Ilocos Sur) Mira
- (Province of Pangasinan) Minosicoan
- (Province of Ilocos Sur) Mindoro
- (Province of La Union) Mindoro
- (Province of Ilocos Norte) Milamilan
- (Province of Pangasinan) Mestizo Norte
- (Province of Pangasinan) Mendozo
- (Province of Ilocos Sur) McKinley
- (Province of Pangasinan) Mayombo
- (Province of Ilocos Sur) Mainganay Sur
- (Province of Ilocos Sur) Mainganay Norte
- (Province of Ilocos Sur) Maupong
- (Province of Ilocos Sur) Matue
- (Province of Ilocos Sur) Matocbo
- (Province of Pangasinan) Matindeg
- (Province of La Union) Matiklico
- (Province of Ilocos Sur) Matibuey
- (Province of Ilocos Sur) Matbo
- (Province of Ilocos Sur) Matanubong