Hannibal, MO

ZIP code 63401 is located in Hannibal, Missouri. Known as the hometown of Mark Twain, Hannibal is a historic city along the Mississippi River. Landmarks in this ZIP code include the Mark Twain Boyhood Home and Museum, the Mark Twain Riverboat, and the Hannibal History Museum. Visitors can explore the charming downtown area, stroll along the riverfront, or learn about the city's rich history.