What is oldest town along the Mississippi river?

It produces a vital source of water to crops and people.

it provide water to the towns people and it helps when Mississippi wants to trade with other places.

As it flows through - Minnesota, Wisconsin, Iowa, Illinois, Missouri, Kentucky, Tennessee, Arkansas, Mississippi and Louisiana, the answer is who ever lives in those states near the river.

St. Anthony Falls

The oldest city on the Mississippi River is Natchez, Ms (formerly) Fort Rosalie