It’s composed of one component city — San Fernando City, which serves as the provincial capital — and 19 municipalities. San Fernando City stands as the heart of the province, functioning as its main center of commerce, education, and governance. It is home to major establishments, government offices, and educational institutions that play a vital role in the province’s growth and development.

The municipalities, each showcasing their own unique culture, traditions, and attractions, add depth to La Union’s identity. Towns such as San Juan, known as the “Surfing Capital of the North,” attract both local and international tourists for their lively surf scene and coastal charm. Bauang, famous for its long stretch of beautiful beaches and resorts, offers a laid-back atmosphere perfect for relaxation and recreation. Meanwhile, Luna stands out with its historical and cultural significance, highlighted by the Baluarte Watchtower and centuries-old churches that reflect the province’s rich heritage.

Other municipalities contribute to La Union’s appeal through their agricultural landscapes, eco-tourism destinations, and local festivities that celebrate community spirit. Together, San Fernando City and its 19 municipalities form a harmonious blend of urban development, cultural heritage, and natural beauty, making La Union a vibrant and diverse province that continues to captivate visitors and locals alike.