A United States Post Office is located behind the Caver's Camp Store near the Mammoth Cave Campground. (270)758-2311.
The postal code for Mammoth Cave is 42259.
Post Office Hours:
Did You Know?
The grease-oil lamp was used to illuminate Mammoth Cave for more than a century. Designed after New England whale-oil lanterns, these lamps used cooking grease to light the way.