The Old Louisiana State Capitol, also known as the State House, is a historic government building, and now a museum, at 100 North Boulevard in Baton Rouge, Louisiana, U.S. It housed the Louisiana State Legislature from the mid-19th century until the current capitol tower building was constructed from 1929-32.

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 and city, Greater Baton Rouge.