Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — CITY/WY/NEWCASTLE

Newcastle ZIP code, Wyoming

The ZIP code for Newcastle, WY is 82701, and its area code is 307.

USPS city name
1 ZIP code
Population
3,348
Area code
307
State
Wyoming

Newcastle in numbers

About 3,348 people live in Newcastle, in 1,229 households, the 24th-largest of Wyoming's 192 census places. The median household income is $82,734 a year, 9% above the Wyoming median of $76,176 (US: $80,734). The median owner-occupied home is valued at $178,900 (42% below the Wyoming median), and median gross rent is $758 a month. The median age is 38.6; 20.0% of adults 25 and over hold a bachelor's degree or higher (30.6% across Wyoming); the average commute takes 27 minutes.

Population3,348Newcastle3,348
Households1,229Newcastle1,229
Median age38.6Newcastle38.6Wyoming39.1US 38.9
Median household income$82,734Newcastle$82,734Wyoming$76,176US $80,734
Median home value$178,900Newcastle$178,900Wyoming$309,700US $332,700
Median gross rent$758Newcastle$758Wyoming$992US $1,413
Bachelor's degree or higher20.0%Newcastle20.0%Wyoming30.6%US 35.7%
Mean commute26.9 minNewcastle26.9 minWyoming18.8 minUS 26.4 min
Population density1,307 / sq miNewcastle1,307 / sq mi

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

ZIP codes addressed as Newcastle

ZIP codes with the USPS city name Newcastle
ZIP City Type Population Median income Median home
82701 Newcastle , WY Standard 5,459 $90,922 $231,200

Map of Newcastle ZIP codes

82701

The ZIP codes of Newcastle, WY, 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.

Towns near Newcastle

The nearest larger towns are Hot Springs, SD (3,548 people, 47 mi), Spearfish, SD (12,930 people, 48 mi) and Rapid City, SD (77,946 people, 51 mi).

More nearby: every ZIP code in Weston County · Wyoming ZIP codes

Cite this page

zipcodes.pro. “Newcastle, WY ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/wy/newcastle

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