The city of Mammoth Cave is assigned specific ZIP Code(s) by the United States Postal Service (USPS) to make mail delivery accurate and efficient. A ZIP Code in Mammoth Cave helps identify the correct postal area, ensuring that letters, parcels, and packages reach the right neighborhood or post office without delay. For residents, businesses, and visitors, knowing the correct Mammoth Cave ZIP Code is important not only for mailing purposes but also for location-based services, navigation, and demographic reference.
| Post Office | Mammoth Cave |
| County | Edmonson |
| State | Kentucky |
| ZIP Code | 42259 |