San Ildefonso
Municipality in the Philippines
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San Ildefonso, officially the Municipality of San Ildefonso, is a 5th class municipality in the province of Ilocos Sur, Philippines. According to the 2020 census, it has a population of 8,190 people. Wikipedia
ZIP code: 2728
Mayor: Christian Daniel A. Purisima
Barangays: 15 (see Barangays)
District: 1st district
IDD: area code: +63 (0)77
Native languages: Ilocano; Tagalog
Region: Ilocos Region