Random Wyoming Address Generator
These addresses are randomly generated for software testing. They are not real people’s details: the street number, unit and recipient name are invented, and no record is checked for deliverability.
Randomly generated Wyoming mailing addresses for software testing, form validation and staging data. Each record pairs a real Wyoming city with a ZIP prefix that serves it and the county that city sits in, then adds a street number, a secondary unit designator and a recipient name that are invented.
Official Wyoming Postal & Geographic Reference Specifications
| Geographic & Postal Parameter | Official State Specification | Standardization Reference |
|---|---|---|
| Postal State Abbreviation | WY | USPS Publication 28 & ISO 3166-2:US |
| 5-Digit ZIP Prefix Range | 820xx–831xx | USPS prefix-to-state assignment |
| Administrative Jurisdictions | 23 Total Counties | US Census Bureau regional boundaries |
| Active Area Codes (NANPA) | 307 (1 total) |
North American Numbering Plan Administrator |
| State Capital | Cheyenne | US Census Bureau |
| Primary Time Zone | Mountain Time (America/Denver, UTC-7 / UTC-6 DST) | IANA time zone database |
Wyoming Postal Geography & Key Cities
ZIP codes and Sectional Center Facilities are derived from public USPS ZIP code data, area codes from the North American Numbering Plan, and county names from US Census Bureau records. Street numbers and recipient names are synthetic, and nothing is checked against an address-verification service.
Cities the generator draws from:
- Cheyenne
- Casper
- Laramie
- Gillette
- Rock Springs
Key Counties & Administrative Jurisdictions
County boundaries determine local sales tax jurisdictions in Wyoming:
- Laramie County
- Natrona County
- Campbell County
- Sweetwater County
Wyoming Area Codes (WY)
Generated phone numbers use the area codes listed in the reference table above, paired with a 555 exchange so no number can reach a real line. Generate Wyoming phone numbers.
Postal Delivery Standards & Format Nuances in Wyoming
- Single statewide 307 area code spanning over 97,000 square miles with the lowest total population in the United States across 23 counties.
- Remote high-plains ranch star routes and Yellowstone / Grand Teton national park postal stations.
Wyoming Address Examples in USPS Publication 28 Format
Residential Delivery Point:100 Main St, Apt 4B
Cheyenne, WY 82001-1204
Commercial / Multi-Unit Delivery Point:Wyoming Logistics & Software Corp
500 Enterprise Way, Suite 300
Casper, WY 82601-4810
Frequently Asked Questions about Wyoming Addresses
- What ZIP codes does Wyoming use for mail and package delivery?
Wyoming (WY) operates within the 5-digit ZIP prefix range 820xx–831xx. Mail routed to state capital Cheyenne and key regional centers such as Cheyenne, Casper, Laramie adheres to these official USPS boundaries.
- Which telephone area codes are valid for Wyoming?
Wyoming is served by a single statewide area code: 307. Because Wyoming operates under a single numbering plan area (NPA), every valid Wyoming phone number begins with 307 — there are no regional sub-assignments to account for in test data. Synthetic telephone numbers generated for Wyoming use area code 307 with a 555 exchange, which is reserved for fictitious use.
- How many counties are in Wyoming?
Wyoming is divided into 23 counties, including major administrative regions such as Laramie, Natrona, Campbell, Sweetwater. Generated street addresses use those names.
- What postal formatting conventions and addressing quirks are unique to Wyoming?
Single statewide 307 area code spanning over 97,000 square miles with the lowest total population in the United States across 23 counties. Remote high-plains ranch star routes and Yellowstone / Grand Teton national park postal stations. All addresses generated on this platform format secondary unit designators (Apt, Ste, Fl) and street suffixes according to USPS CASS standards.
- Are the Wyoming addresses generated on this page real places?
No. All street numbers, recipient names, and telephone numbers generated for Wyoming are entirely synthetic and randomized for software testing, database seed scripts, and form validation. They use Wyoming ZIP codes from public USPS data and real city names, but they do not correspond to real individuals or private residences.
Nearby & Bordering States
Explore test address generators for states sharing a geographic border with WY:
- Montana Address Generator (MT)
- South Dakota Address Generator (SD)
- Nebraska Address Generator (NE)
- Colorado Address Generator (CO)
- Utah Address Generator (UT)
- Idaho Address Generator (ID)
Wyoming ZIP Prefixes
The first three digits of a ZIP code place an address within Wyoming. These are the prefixes assigned to the state:
820xx, 826xx, 827xx, 828xx, 829xx, 830xx
Which processing facility sorts a given prefix is set by the current USPS labeling list L005 and changes as processing is consolidated, so it is not reproduced here. Look up a ZIP prefix to see its state and generate ZIP codes inside it.
Related Postal Tools & Technical Resources
- USA Address Generator & Developer Utility Hub
- Generate Wyoming Phone Numbers with Real Area Codes
- ZIP Code Lookup & Validation
- ZIP prefix lookup
- Synthetic Data vs. Real Data: Best Practices for Dev & Staging
All 51 state address generators, grouped by region.