The Mississippi

The Mississippi is a mentioned only location.

Mentions

 * After completion of High Noon at the Gulch, Sheriff Eagle refers to the Sole Survivor as "the best deputy this side of the Mississippi!"
 * A flyer for an "Outdoor Honkytonk" at The Rusty Pick announced Jesse White's band as the "Best Honky-Tonk Band this side of the Mississippi!"
 * Darius Angler claimed that he was the best chemist "this side of the Mississippi."
 * During the travel of the Brotherhood First Expeditionary Force to Appalachia, their scribes at one point estimated the unit's position to be "somewhere east of the Mississippi based on pre-departure timetables."
 * Jack Hunter mentioned the "splashing of the Mississippi" while he was tripping on Nukashine.

Appearances
The Mississippi is mentioned in the Fallout 4 add-on Nuka-World and Fallout 76.