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zipcodes.pro — STATE/WY/COUNTY/WESTON

Weston County, WY ZIP codes

Weston County, WY has 4 ZIP codes, in 4 towns: 82701, 82730, 82723 and 82715.

The county seat is Newcastle.

ZIP codes
4
Towns
4
County seat
Newcastle
County FIPS
56045
State
Wyoming
Population
6,826
Median household income
$89,509
Land area
2,398 sq mi

Weston County ZIP codes by town

Newcastle (county seat)
82701

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Weston County ZIP codes

82701827158272382730

The ZIP codes of Weston County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Weston County in numbers

About 6,826 people live in Weston County, in 2,848 households, the 21st most populous of Wyoming's 23 counties. The median household income is $89,509 a year, 18% above the Wyoming median of $76,176 (US: $80,734). The median owner-occupied home is valued at $221,700 (28% below the Wyoming median), and median gross rent is $698 a month. The median age is 44.0; 20.1% of adults 25 and over hold a bachelor's degree or higher (30.6% across Wyoming); the average commute takes 30 minutes.

Population6,826Weston6,826
Households2,848Weston2,848
Median age44.0Weston44.0Wyoming39.1US 38.9
Median household income$89,509Weston$89,509Wyoming$76,176US $80,734
Median home value$221,700Weston$221,700Wyoming$309,700US $332,700
Median gross rent$698Weston$698Wyoming$992US $1,413
Bachelor's degree or higher20.1%Weston20.1%Wyoming30.6%US 35.7%
Mean commute30.2 minWeston30.2 minWyoming18.8 minUS 26.4 min
Population density3 / sq miWeston3 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Weston County

Largest towns in Weston County
TownZIP codesPopulation
Newcastle 1 3,348
Upton 1 892
Osage 1 114

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Weston County.

Not sure you are in Weston County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Weston County, with figures

ZIP codes in Weston County
ZIP City Type Population Median income Median home
82701 Newcastle , WY Standard 5,459 $90,922 $231,200
82715 Four Corners , WY No street area — — —
82723 Osage , WY Standard 140 $116,429 $312,100
82730 Upton , WY Standard 1,422 $72,159 $193,800

Cite this page

zipcodes.pro. “Weston County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/wy/county/weston

Underlying data is public domain or openly licensed — sources, vintages and licences.