Zip Codes of the United States

The ZIP code, introduced on July 1, 1963, by the United States Postal Service, extended the existing two-digit postal code in major cities to help manage the increasing use of direct mail by businesses. Its primary aim was to enhance mail processing efficiency and accuracy, addressing the labor shortage resulting from World War II by providing a straightforward system for training new workers.

The first digit of the 5-digit ZIP code signifies the region, with "0" for the Northeast and "9" for Alaska. The next two digits identify a central mail processing facility (SCF) within that region, while the final two digits pinpoint smaller post offices or specific zones in larger cities.

Zip Codes by State

Alaska Zip Codes

273 Zip Codes

Alabama Zip Codes

726 Zip Codes

Arkansas Zip Codes

637 Zip Codes

Arizona Zip Codes

551 Zip Codes

California Zip Codes

2,525 Zip Codes

Colorado Zip Codes

587 Zip Codes

Connecticut Zip Codes

439 Zip Codes

Delaware Zip Codes

91 Zip Codes

Florida Zip Codes

1,406 Zip Codes

Georgia Zip Codes

910 Zip Codes

Hawaii Zip Codes

132 Zip Codes

Idaho Zip Codes

258 Zip Codes

Illinois Zip Codes

1,577 Zip Codes

Indiana Zip Codes

904 Zip Codes

Iowa Zip Codes

1,034 Zip Codes

Kansas Zip Codes

763 Zip Codes

Kentucky Zip Codes

660 Zip Codes

Louisiana Zip Codes

635 Zip Codes

Maine Zip Codes

478 Zip Codes

Maryland Zip Codes

534 Zip Codes

Massachusetts Zip Codes

703 Zip Codes

Michigan Zip Codes

1,171 Zip Codes

Minnesota Zip Codes

1,031 Zip Codes

Mississippi Zip Codes

452 Zip Codes

Missouri Zip Codes

1,030 Zip Codes

Montana Zip Codes

361 Zip Codes

Nebraska Zip Codes

608 Zip Codes

Nevada Zip Codes

240 Zip Codes

New Hampshire Zip Codes

289 Zip Codes

New Jersey Zip Codes

734 Zip Codes

New Mexico Zip Codes

370 Zip Codes

New York Zip Codes

2,208 Zip Codes

North Carolina Zip Codes

940 Zip Codes

North Dakota Zip Codes

409 Zip Codes

Ohio Zip Codes

1,426 Zip Codes

Oklahoma Zip Codes

750 Zip Codes

Oregon Zip Codes

416 Zip Codes

Pennsylvania Zip Codes

2,216 Zip Codes

Rhode Island Zip Codes

92 Zip Codes

South Carolina Zip Codes

499 Zip Codes

South Dakota Zip Codes

399 Zip Codes

Tennessee Zip Codes

690 Zip Codes

Texas Zip Codes

2,371 Zip Codes

Utah Zip Codes

328 Zip Codes

Vermont Zip Codes

308 Zip Codes

Virginia Zip Codes

889 Zip Codes

Washington Zip Codes

644 Zip Codes

West Virginia Zip Codes

528 Zip Codes

Wisconsin Zip Codes

898 Zip Codes

Wyoming Zip Codes

161 Zip Codes

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