What Coast Is the Mississippi River On? None—It Empties Into the Gulf of Mexico

The Mississippi River doesn't sit on a coast. It flows ~2,340 miles through central North America—from Lake Itasca, Minnesota—south to the Gulf of Mexico, where it deposits its massive sediment load at the "Bird's Foot" delta in Louisiana.

It's a continental river, not a coastal one—draining 41% of the contiguous U.S. before reaching salt water.