ExxonMobil's Baton Rouge Refinery in Baton Rouge, Louisiana is the fifth-largest oil refinery in the United States and thirteenth-largest in the world, with an input capacity of 540,000 barrels (86,000 m3) per day as of January 1, 2020. The refinery is the site of the first commercial fluid catalytic cracking plant that began processing at the refinery on May 25, 1942.