The Baton Rouge metropolitan statistical area, as defined by the United States Office of Management and Budget, or simply the Baton Rouge metropolitan area or Greater Baton Rouge, is a sprawling metropolitan statistical area surrounding the city of Baton Rouge. Including the western edge of the Florida Parishes regions, it is known as "Plantation Country", the "Capital Region", and "The 225". At the 2010 U.S. census, the metropolitan area had a population of 802,484, up from 705,973 in 2000. At the 2020 census, its population increased to 870,569, up from 2020 estimates at 858,571.

Baton Rouge is the capital city of the U.S. state of Louisiana. Located on the eastern bank of the Mississippi River, it had a population of 227,470 as of 2020; it is the seat of Louisiana's most populous parish (county-equivalent), East Baton Rouge Parish, and the center of Louisiana's second-largest metropolitan area, Greater Baton Rouge.