West Baton Rouge Parish is one of the sixty-four parishes in the U.S. state of Louisiana. Established in 1807, its parish seat is Port Allen. With a 2020 census population of 27,199 residents, West Baton Rouge Parish is part of the Baton Rouge metropolitan statistical area. The parish has a highly rated school system, and is one of the few in Louisiana that has privatized school bus services. West Baton Rouge saw a very small percentage of growth after Hurricane Katrina.