Ilocos Region Postal Codes: 2400 to 2922

Key Facts

Ilocos Region, officially designated as Region I, is one of the Philippines' 17 administrative regions, situated in the northwestern part of Luzon island. This coastal region stretches along the South China Sea and is bordered by the Cordillera Administrative Region to the east and the Cagayan Valley region to the northeast. With a total land area of approximately 13,013 square kilometers, Ilocos Region encompasses four provinces: Ilocos Norte, Ilocos Sur, La Union, and Pangasinan. According to the 2020 census, the region has a population of over 5.3 million people, with San Fernando City in La Union serving as the regional center. The region's geography features a narrow coastal plain backed by the rugged Cordillera Central mountains, creating diverse landscapes from sandy beaches to mountainous terrain. Historically significant as one of the first areas colonized by Spain in the 16th century, Ilocos Region preserves numerous Spanish-era architectural landmarks and cultural traditions. The region's economy is primarily agricultural, with tobacco, rice, corn, and garlic as major crops, complemented by growing tourism and fisheries sectors. For those seeking detailed location information, postal code data is available for all municipalities and cities across the region's four provinces.

Neighboring Regions

• Cagayan Valley
• Cordillera Administrative Region
• Central Luzon