Barangays under ZIP 2731

San Juan is a 1st-class Municipality in the province of Ilocos Sur, Ilocos Region (Region I), Philippines. Based on 2024 PSA data, it has a population of 26,709 residents.

Barangays under ZIP 2731

Alilem Municipality

2716

Banayoyo Municipality

2907

2727

2918

2732

2702

Cervantes Municipality

2718

City of Candon Component City

2710

City of Vigan Component City

2700

Galimuyod Municipality

2709

About ZIP Code 2731

ZIP code 2731 is the Philippine postal code assigned to San Juan, a municipality in the province of Ilocos Sur, Ilocos Region, . Based on PSA census data, San Juan has a population of 26,709. Its Philippine Standard Geographic Code (PSGC) is 0102920000. This postal code is used for mail delivery, logistics, and address verification across all 0 barangays within San Juan.