The table below contains the list of all the provinces found in the Ilocos region or Region I. There are 4 provinces under Region I. Please refer to the list below.
List of Ilocos Region Provinces and Its Capital
Hundred Islands found in Pangasinan

Ilocos Region Provinces and Its Capital

Ilocos Region
Provinces
Capital
Ilocos Norte Laoag City
Ilocos Sur Vigan City
La Union San Fernando City
Pangasinan Lingayen
Source: wikipedia.org