Ilocos Norte's 1st provincial district consists of the same area as Ilocos Norte's 1st legislative district. Five board members are elected from this provincial district.
Ilocos Norte's 2nd provincial district consists of the same area as Ilocos Norte's 2nd legislative district. Five board members are elected from this provincial district.
Ilocos Sur's 1st provincial district consists of the same area as Ilocos Sur's 1st legislative district. Five board members are elected from this provincial district.
Ilocos Sur's 2nd provincial district consists of the same area as Ilocos Sur's 2nd legislative district. Five board members are elected from this provincial district.
La Union's 1st provincial district consists of the same area as La Union's 1st legislative district. Five board members are elected from this provincial district.
La Union's 2nd provincial district consists of the same area as La Union's 2nd legislative district. Five board members are elected from this provincial district.
Pangasinan's 1st provincial district consists of the same area as Pangasinan's 1st legislative district. Two board members are elected from this provincial district.
Pangasinan's 2nd provincial district consists of the same area as Pangasinan's 2nd legislative district. Two board members are elected from this provincial district.
Pangasinan's 3rd provincial district consists of the same area as Pangasinan's 3rd legislative district. Two board members are elected from this provincial district.
Pangasinan's 4th provincial district consists of the same area as Pangasinan's 4th legislative district. Two board members are elected from this provincial district.
Pangasinan's 5th provincial district consists of the same area as Pangasinan's 5th legislative district. Two board members are elected from this provincial district.
Pangasinan's 6th provincial district consists of the same area as Pangasinan's 6th legislative district. Two board members are elected from this provincial district.