Carthage, IL

ZIP code 62321 covers the town of Carthage in Hancock County, Illinois. Situated along the Mississippi River, it is home to the Historic Carthage Jail where Joseph Smith, founder of the Mormon religion, was incarcerated before his death in 1844. The city also boasts the Hancock County Courthouse, a stunning example of Beaux-Arts architecture, and a variety of charming shops and restaurants in its downtown area.