Caba, officially the Municipality of Caba, is a coastal municipality in the province of La Union, Philippines. According to the 2020 census, it h…Caba, officially the Municipality of Caba, is a coastal municipality in the province of La Union, Philippines. According to the 2020 census, it has a population of 23,119 people. Caba is notable as the birthplace of Diego Silang, a prominent Filipino revolutionary leader who led an uprising against Spanish colonial rule in the Ilocos Region in 1762. The municipality is known for its thriving bamboo industry and its scenic beaches. As of 2022, Caba had 17,787 registered voters.