What is the nearest seaport to St. Louis MO?

St.Louis is an inland city that does not have a traditional seaport. However, it does have a port on the Mississippi River knowns as the Port of St. Louis, which is located in southern Illinois, just across the river from St. Louis, Missouri. The Port of St. Louis serves as a hub for river transportation, handling a variety of cargo and plays an important role in the region's economy.