San Juan, officially the Municipality of San Juan, is a municipality in the province of Abra, Philippines. According to the 2020 census, it has a population of 10,688 people. The present-day town of San Juan was once inhabited by Tinguians, belonging to the Inlaud Tribe. Before the Spanish colonial era, the natives were believed to have traded with the Indo-Chinese. They were believed to have bartered with them as evidenced by the presence of antique jars, big bowls, gongs, arrows and shields, beads, jewel and gems.