Map of Batangas showing the location of San Juan. Government Region CALABARZON (Region IV-A) Province Batangas District 4th district of Batangas Barangays 42 Income Class: 2nd class municipality Mayor Danilo Mindanao (Lakas-CMD) Physical characteristics Area 278.40 km? Population      Total (2000)      Density 78,169 280.78/km? San Juan is a 2nd class municipality in the province of Batangas, Philippines. It occupies the easternmost portion of the province, 43 kilometers east of Batangas City, also the same distance southwest of Lucena City, Quezon, and 115 kilometers away from Manila. According to the 2000 census, it has a population of 78,169 people in 16,519 households.