The United States Postal Service (USPS) has utilized ZIP codes since 1963 to improve mail delivery efficiency. ZIP codes, standing for “Zone Improvement Plan,” are essential for sorting and delivering mail accurately. They consist of five digits, with an optional four-digit extension for more precise locations.

- 0xxxx: Northeastern states
- 1xxxx: Delaware, New York, Pennsylvania
- 2xxxx: District of Columbia, Maryland, North Carolina, South Carolina, Virginia, West Virginia
- 3xxxx: Alabama, Florida, Georgia, Mississippi, Tennessee
- 4xxxx: Indiana, Kentucky, Michigan, Ohio
- 5xxxx: Iowa, Minnesota, Montana, North Dakota, South Dakota, Wisconsin
- 6xxxx: Illinois, Kansas, Missouri, Nebraska
- 7xxxx: Arkansas, Louisiana, Oklahoma, Texas
- 8xxxx: Arizona, Colorado, Idaho, New Mexico, Nevada, Utah, Wyoming
- 9xxxx: Alaska, American Samoa, California, Guam, Hawaii, Northern Mariana Islands, Oregon, Washington
ZIP Codes by State
USPS | State | ZIP Code | State Capital |
---|---|---|---|
AL | Alabama | 35004 to 36925 | Montgomery |
AK | Alaska | 99501 to 99950 | Juneau |
AZ | Arizona | 85001 to 86556 | Phoenix |
AR | Arkansas | 71601 to 72959 | Little Rock |
CA | California | 90001 to 96162 | Sacramento |
CO | Colorado | 80001 to 81658 | Denver |
CT | Connecticut | 06001 to 06928 | Hartford |
DE | Delaware | 19701 to 19980 | Dover |
FL | Florida | 32003 to 34997 | Tallahassee |
GA | Georgia | 30002 to 39901 | Atlanta |
HI | Hawaii | 96701 to 96898 | Honolulu |
ID | Idaho | 83201 to 83877 | Boise |
IL | Illinois | 60001 to 62999 | Springfield |
IN | Indiana | 46001 to 47997 | Indianapolis |
IA | Iowa | 50001 to 52809 | Des Moines |
KS | Kansas | 66002 to 67954 | Topeka |
KY | Kentucky | 40003 to 42788 | Frankfort |
LA | Louisiana | 70001 to 71497 | Baton Rouge |
ME | Maine | 03901 to 04992 | Augusta |
MD | Maryland | 20588 to 21930 | Annapolis |
MA | Massachusetts | 01001 to 05544 | Boston |
MI | Michigan | 48001 to 49971 | Lansing |
MN | Minnesota | 55001 to 56763 | Saint Paul |
MS | Mississippi | 38601 to 39776 | Jackson |
MO | Missouri | 63001 to 65899 | Jefferson City |
MT | Montana | 59001 to 59937 | Helena |
NE | Nebraska | 68001 to 69367 | Lincoln |
NV | Nevada | 88901 to 89883 | Carson City |
NH | New Hampshire | 03031 to 03897 | Concord |
NJ | New Jersey | 07001 to 08989 | Trenton |
NM | New Mexico | 87001 to 88439 | Santa Fe |
NY | New York | 00501 to 14925 | Albany |
NC | North Carolina | 27006 to 28909 | Raleigh |
ND | North Dakota | 58001 to 58856 | Bismarck |
OH | Ohio | 43001 to 45999 | Columbus |
OK | Oklahoma | 73001 to 74966 | Oklahoma City |
OR | Oregon | 97001 to 97920 | Salem |
PA | Pennsylvania | 15001 to 19640 | Harrisburg |
RI | Rhode Island | 02801 to 02940 | Providence |
SC | South Carolina | 29001 to 29945 | Columbia |
SD | South Dakota | 57001 to 57799 | Pierre |
TN | Tennessee | 37010 to 38589 | Nashville |
TX | Texas | 73301 to 88595 | Austin |
UT | Utah | 84001 to 84791 | Salt Lake City |
VT | Vermont | 05001 to 05907 | Montpelier |
VA | Virginia | 20101 to 24658 | Richmond |
WA | Washington | 98001 to 99403 | Olympia |
WV | West Virginia | 24701 to 26886 | Charleston |
WI | Wisconsin | 53001 to 54990 | Madison |
WY | Wyoming | 82001 to 83414 | Cheyenne |
Special ZIP Codes
Certain ZIP codes are unique and hold special designations:
- 00501: Internal Revenue Service center in Holtsville, NY
- 12345: General Electric in Schenectady, NY
- 60606: Chicago Loop
- 90210: Beverly Hills, CA, famously known due to popular culture
ZIP Code Extensions
The five-digit ZIP code system was expanded in 1983 with ZIP+4 codes to further improve mail sorting. These codes add a hyphen and four additional digits to the basic five-digit code, which identify a more specific location like a building, apartment group, or a P.O. Box.
For example:
- 12345-6789 indicates a specific area within the 12345 ZIP code.
ZIP Code Facts and Trivia
- Oldest ZIP Code: The first ZIP code assigned was 00501, which is used by the IRS.
- Most Populous ZIP Code: 77449 in Katy, Texas, with over 120,000 residents.
- Smallest ZIP Code by Area: 10199 in New York City, which is just one building.
FAQs
What is the ZIP Code for the USA?
The USA uses a system of ZIP Codes, which are 5-digit numbers. Each ZIP Code corresponds to a specific area within the country. There is no single ZIP Code for the entire USA.
What is a valid US ZIP Code?
A valid US ZIP Code consists of 5 digits, such as 90210. There are also ZIP+4 Codes, which add a hyphen and four additional digits for more precise locations, like 90210-1234.
Is there a 4-digit ZIP Code in the US?
No, US ZIP Codes are either 5 digits (standard ZIP Code) or 9 digits (ZIP+4 Code).
What is the ZIP Code range for the USA?
The ZIP Code range for the USA starts at 00501 (Holtsville, NY) and goes up to 99950 (Ketchikan, AK).
What ZIP Code is 84198?
ZIP Code 84198 is in Salt Lake City, Utah.
What is USA ZIP?
USA ZIP is a system of postal codes used by the United States Postal Service (USPS) to identify locations within the country. “ZIP” stands for “Zone Improvement Plan.”
How to write a full ZIP Code?
A full ZIP Code (ZIP+4) is written as follows: 12345-6789, where “12345” is the standard ZIP Code and “6789” is the additional 4 digits.
What is an example of a US address?
John Doe
123 Main Street
Springfield, IL 62701
USA
How to read a USA ZIP Code?
A USA ZIP Code is read as a 5-digit number, sometimes followed by a hyphen and four additional digits for more precise locations (ZIP+4). For example, 12345 or 12345-6789.
What ZIP Code is 60653?
ZIP Code 60653 is in Chicago, Illinois.
What is the ZIP Code of USA New York?
New York City has multiple ZIP Codes. For example, Manhattan’s ZIP Code ranges from 10001 to 10282.
What is the ZIP Code for USA, Texas?
Texas has many ZIP Codes. For example, Houston has ZIP Codes ranging from 77001 to 77299.
What is the ZIP Code of USA, California?
California has many ZIP Codes. For example, Los Angeles has ZIP Codes ranging from 90001 to 90089.