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All United States ZIP Codes

ZIP, County, Place name or State

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US ZIP Codes by County on A

To see a list of all ZIP codes by County on the selected letter, select the desired County from the list or write the desired County in the appropriate field and click Search.
Androscoggin
Aroostook
Addison
Atlantic
Albany
Allegany
Allegheny
Armstrong
Adams
Anne Arundel
Arlington
Alexandria (city)
Augusta
Albemarle
Amelia
Accomack
Appomattox
Alleghany
Amherst
Alamance
Anson
Avery
Ashe
Alexander
Aiken
Abbeville
Anderson
Allendale
Appling
Atkinson
Alachua
Autauga
Alcorn
Attala
Amite
Allen
Adair
Ashtabula
Ashland
Athens
Auglaize
Arenac
Alcona
Allegan
Antrim
Alpena
Alger
Audubon
Allamakee
Appanoose
Anoka
Aitkin
Aurora
Audrain
Andrew
Atchison
Antelope
Arthur
Assumption
Ascension
Acadia
Avoyelles
Ashley
Arkansas
Alfalfa
Atoka
Angelina
Archer
Austin
Atascosa
Aransas
Andrews
Arapahoe
Alamosa
Archuleta
Ada
Apache
Alameda
Amador
Alpine
Asotin
Anchorage Municipality
Aleutians East
Adjuntas
Aguada
Aguadilla
Añasco
Arecibo
Aguas Buenas
Aibonito
Arroyo
Alexandria
Anchorage
Aleutians West

ZIP Codes are a system of postal codes used by the United States Postal Service (USPS) since 1963. The term ZIP is an acronym for Zone Improvement Plan; it was chosen to suggest that the mail travels more efficiently and quickly (zipping along) when senders use the code in the postal address. The basic format consists of five digits. An extended 'ZIP+4' code was introduced in 1983 which includes the five digits of the ZIP Code, followed by a hyphen and four additional digits that determine a more specific location.--Wikipedia