The city of Cabin John is assigned specific ZIP Code(s) by the United States Postal Service (USPS) to make mail delivery accurate and efficient. A ZIP Code in Cabin John 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 Cabin John ZIP Code is important not only for mailing purposes but also for location-based services, navigation, and demographic reference.
| Post Office | Cabin John |
| County | Montgomery |
| State | Maryland |
| ZIP Code | 20818 |