Baton Rouge is the capital city of the U.S. state of Louisiana. Located on the eastern bank of the Mississippi River, it is the parish seat of East Baton Rouge Parish, Louisiana's most populous parish. Since 2020, it has been the second-largest city in Louisiana after New Orleans; Baton Rouge is the 18th-most-populous state capital. According to the 2020 United States census, the city-proper had a population of 227,470; its consolidated population was 456,781 in 2020. The city is the center of the Greater Baton Rouge area—Louisiana's second-largest metropolitan area—with a population of 870,569 as of 2020, up from 802,484 in 2010. Baton Rouge is the fourth most populous city proper in the Deep South region of the southeastern United States.