What Is the Abbreviation for Wyoming?
The standard abbreviation for Wyoming is WY. This page explains why Wyoming uses WY, how the code fits into the modern USPS system, what older printed abbreviations looked like, and which nearby or similar state codes people commonly confuse with it.
What Is the Abbreviation for Wyoming?
The abbreviation for Wyoming is WY. In older writing you might see Wyo., but today's mailing, form, and database standard is WY.
Use WY for Wyoming in mailing addresses, shipping labels, government forms, and business records.
Why Wyoming Uses WY
Wyoming uses the USPS abbreviation WY.
USPS adopted WY for Wyoming in 1963. The older form Wyo. still appears in older writing, but WY is the standard postal abbreviation today.
Old Abbreviation for Wyoming
Before the USPS two-letter system became the mailing standard in 1963, printed reference books and newspapers often used longer abbreviations with punctuation. For Wyoming, that older style was usually Wyo..
That older form still appears in historical texts, archival material, and some legacy style guides, but the modern postal and database standard is WY. If someone searches for old abbreviation for Wyoming, the practical answer is to recognize Wyo. and use WY in current writing and addresses.
How to Write Wyoming in an Address
In standard American addressing, the state line uses the city name followed by the two-letter code and ZIP Code. The abbreviation stays uppercase and does not take periods.
That same format applies in checkout forms, school worksheets, CRM exports, spreadsheets, shipping labels, and government databases — anywhere a two-letter state code is required.
WY Compared With Similar State Codes
WY is often checked against WA, WV, and WI because several W-state codes differ by only one letter.
Related Abbreviation Questions
These states share a first letter, region, or alphabetical position with Wyoming and are commonly checked alongside it.
Capital, Region, and Context
Wyoming belongs to the West region. Its capital is Cheyenne, and its postal code WY is used in addresses, forms, and databases throughout the country.
Wyoming entered the Union on July 10, 1890.
FAQ
What is the abbreviation for Wyoming?
The standard USPS abbreviation for Wyoming is WY.
What is the postal abbreviation for Wyoming?
WY is the two-letter postal abbreviation for Wyoming. It is the form used in mailing addresses, shipping labels, forms, and databases.
How do you abbreviate Wyoming?
Abbreviate Wyoming as WY in current USPS, mailing, and database use.
Why is Wyoming abbreviated WY?
Wyoming uses the USPS abbreviation WY.
What does WY stand for?
WY stands for Wyoming in the USPS state abbreviation system.
What is the old abbreviation for Wyoming?
Older editorial styles often wrote Wyoming as Wyo.. For mailing and database use, the modern standard is WY.
How do you write a Wyoming mailing address?
Use the city name, then the two-letter postal code WY, then the ZIP Code. For example: Cheyenne, WY 00000.
What state is WY?
WY is the postal abbreviation for Wyoming, located in the West region. The capital is Cheyenne.
Test All 50 State Abbreviations
Now that you know WY stands for Wyoming, see how many of the other 49 you can get right. The M-states and I-states trip up most people.