San Juan is the capital city and most populous municipality in Puerto Rico, an unincorporated territory, and insular area of the United States. San Juan was founded by Spanish colonists in 1521, who called it Ciudad de Puerto Rico.
San Juan is the capital city and most populous municipality in Puerto Rico, an unincorporated territory, and insular area of the United States. San Juan was founded by Spanish colonists in 1521, who called it Ciudad de Puerto Rico.