Port Hudson is an unincorporated community in East Baton Rouge Parish, Louisiana, United States. Located about 20 miles (32 km) northwest of Baton Rouge, it is known primarily as the location of an American Civil War battle, the siege of Port Hudson, in 1863.

East Baton Rouge Parish is the most populous parish in the U.S. state of Louisiana. Its population was 456,781 at the 2020 census. The parish seat is Baton Rouge, Louisiana's state capital. East Baton Rouge Parish is located within the Greater Baton Rouge area.