East Baton Rouge Parish

East Baton Rouge Parish (French: Paroisse de Bâton-Rouge Est, Spanish: Parroquia de East Baton Rouge) is the most populous parish in the U.S. state of Louisiana. As of the 2010 census, the population was 440,171. The parish seat is Baton Rouge, Louisiana's state capital. East Baton Rouge Parish (French: Paroisse de Bâton-Rouge Est, Spanish: Parroquia de East Baton Rouge) is the most populous parish in the U.S. state of Louisiana. As of the 2010 census, the population was 440,171. The parish seat is Baton Rouge, Louisiana's state capital. East Baton Rouge Parish is located inside of the Baton Rouge, LA Metropolitan Statistical Area. According to the U.S. Census Bureau, the parish has a total area of 470 square miles (1,200 km2), of which 455 square miles (1,180 km2) is land and 15 square miles (39 km2) (3.2%) is water.