US United States Major Regions Postal Code Details
🏛️ Montgomery · Maryland
20861Ashton
Ashton montgomery maryland 20861 United States
20916Aspen Hill
Aspen Hill montgomery maryland 20916 United States
20838Barnesville
Barnesville montgomery maryland 20838 United States
20839Beallsville
Beallsville montgomery maryland 20839 United States
20816Bethesda
Bethesda montgomery maryland 20816 United States
20841Boyds
Boyds montgomery maryland 20841 United States
20862Brinklow
Brinklow montgomery maryland 20862 United States
20833Brookeville
Brookeville montgomery maryland 20833 United States
20866Burtonsville
Burtonsville montgomery maryland 20866 United States
20818Cabin John
Cabin John montgomery maryland 20818 United States
20825Chevy Chase
Chevy Chase montgomery maryland 20825 United States
20815Chevy Chase Village
Chevy Chase Village montgomery maryland 20815 United States
20871Clarksburg
Clarksburg montgomery maryland 20871 United States
20904Cloverly
Cloverly montgomery maryland 20904 United States
20904Colesville
Colesville montgomery maryland 20904 United States
20842Comus
Comus montgomery maryland 20842 United States
20872Damascus
Damascus montgomery maryland 20872 United States
20874Darnestown
Darnestown montgomery maryland 20874 United States
20855Derwood
Derwood montgomery maryland 20855 United States
20842Dickerson
Dickerson montgomery maryland 20842 United States
20879Gaithersburg
Gaithersburg montgomery maryland 20879 United States
20896Garrett Park
Garrett Park montgomery maryland 20896 United States
20810Geico
Geico montgomery maryland 20810 United States
20876Germantown
Germantown montgomery maryland 20876 United States
20812Glen Echo
Glen Echo montgomery maryland 20812 United States
20906Glenmont
Glenmont montgomery maryland 20906 United States
20857HHS
HHS montgomery maryland 20857 United States
20903Hillandale
Hillandale montgomery maryland 20903 United States
20871Hyattstown
Hyattstown montgomery maryland 20871 United States
20891Kensington
Kensington montgomery maryland 20891 United States
20882Laytonsville
Laytonsville montgomery maryland 20882 United States
20906Leisure World
Leisure World montgomery maryland 20906 United States
20815Martins Additions
Martins Additions montgomery maryland 20815 United States
20886Montgomery Village
Montgomery Village montgomery maryland 20886 United States
20892National Institute Of Health
National Institute Of Health montgomery maryland 20892 United States
20894National Library Of Medicine
National Library Of Medicine montgomery maryland 20894 United States
20889National Naval Medical Ctr
National Naval Medical Ctr montgomery maryland 20889 United States
20899Natl Inst Stds & Tech Md
Natl Inst Stds & Tech Md montgomery maryland 20899 United States
20906Norbeck
Norbeck montgomery maryland 20906 United States
20852North Bethesda
North Bethesda montgomery maryland 20852 United States
20815North Chevy Chase
North Chevy Chase montgomery maryland 20815 United States
20878North Potomac
North Potomac montgomery maryland 20878 United States
20830Olney
Olney montgomery maryland 20830 United States
20837Poolesville
Poolesville montgomery maryland 20837 United States
20859Potomac
Potomac montgomery maryland 20859 United States
20850Rockville
Rockville montgomery maryland 20850 United States
20860Sandy Spring
Sandy Spring montgomery maryland 20860 United States
20912Silver Spring
Silver Spring montgomery maryland 20912 United States
20815Somerset
Somerset montgomery maryland 20815 United States
20868Spencerville
Spencerville montgomery maryland 20868 United States
20897Subn Md Fac
Subn Md Fac montgomery maryland 20897 United States
20897Suburb Maryland Fac
Suburb Maryland Fac montgomery maryland 20897 United States
20897Suburban Md Brm
Suburban Md Brm montgomery maryland 20897 United States
20833Sunshine
Sunshine montgomery maryland 20833 United States
20912Takoma Park
Takoma Park montgomery maryland 20912 United States
20833Unity
Unity montgomery maryland 20833 United States
20993US Food And Drug Admin
US Food And Drug Admin montgomery maryland 20993 United States
20827W Bethesda
W Bethesda montgomery maryland 20827 United States
20889Walter Reed Natl Mil Med Ctr
Walter Reed Natl Mil Med Ctr montgomery maryland 20889 United States
20880Washington Grove
Washington Grove montgomery maryland 20880 United States
20817Westlake
Westlake montgomery maryland 20817 United States
20906Wheaton
Wheaton montgomery maryland 20906 United States
📋 United States Address and Delivery Guidance
📮
Use a Complete Delivery Address:
Include the recipient name, building or street address, locality, region where applicable, postal code when the destination uses one, and the destination country or territory.
🌍
Follow Local Address Conventions:
Use the language, character set and address order requested by the recipient, official postal operator or carrier. Do not assume every destination uses the same postal-code format.
✅
Verify Before Dispatch:
Confirm the postal code, service coverage and any customs or carrier requirements with the recipient and the relevant official postal operator before shipping.
💡
Delivery Information Is Context-Specific:
Postal codes help routing only in territories that use them. Accurate recipient details remain essential for delivery in every destination.
Postal information, sources and verification
Use this page as a routing reference and confirm the complete address, postal code format and delivery restrictions with the relevant official postal operator or carrier before dispatch.
Editorial and service accountability
This postal-code reference is maintained by the 56ok.com logistics-content team for international shipping preparation. It is reviewed against publicly available postal-operator information; it is not an official postal authority and does not replace carrier or customs instructions.
This reference is maintained as postal and carrier information changes. Need a correction? Contact our team.
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📮United States Postal FAQ and delivery guidance
📮 What is the format of a US ZIP code?
Standard format is 5 digits (e.g., 10001). Extended format is ZIP+4 (9 digits like 10001-1234) with a hyphen.
🔍 How to find the ZIP code for an address?
Use the USPS ZIP Code Lookup tool by entering the full address on the official USPS website.
⚠️ What happens if I use a wrong ZIP code?
Mail may be delayed, returned, or lost. For important documents, use USPS tracking and verify the ZIP code.
🔄 Do ZIP codes ever change?
Yes, USPS may update ZIP codes due to regional adjustments. Always confirm your ZIP code after an address change.
📦 Is a ZIP code required for international mail to the US?
Absolutely. Always include the US ZIP code at the end of the address (e.g., New York, NY 10001 USA).
