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/UT/NEWCASTLE

Newcastle ZIP code, Utah

The ZIP code for Newcastle, UT is 84756, and its area code is 435.

USPS city name
1 ZIP code
Population
367
Area code
435
State
Utah

Newcastle in numbers

About 367 people live in Newcastle, in 104 households. The median household income is $86,739 a year, 9% below the Utah median of $95,166 (US: $80,734). The median owner-occupied home is valued at $280,400 (43% below the Utah median). The median age is 48.9; 35.0% of adults 25 and over hold a bachelor's degree or higher (37.7% across Utah); the average commute takes 24 minutes.

Population367Newcastle367
Households104Newcastle104
Median age48.9Newcastle48.9Utah32.0US 38.9
Median household income$86,739Newcastle$86,739Utah$95,166US $80,734
Median home value$280,400Newcastle$280,400Utah$489,400US $332,700
Bachelor's degree or higher35.0%Newcastle35.0%Utah37.7%US 35.7%
Mean commute23.8 minNewcastle23.8 minUtah22.1 minUS 26.4 min
Population density92 / sq miNewcastle92 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Newcastle CDP. 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
84756 Newcastle , UT Standard 390 $85,489 $255,400

Map of Newcastle ZIP codes

84756

The ZIP codes of Newcastle, UT, 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 Enterprise (1,955 people, 12 mi), Central (660 people, 17 mi) and New Harmony (393 people, 19 mi).

Towns near Newcastle
TownPopulationDistance
Cedar City 38,524 25.7 mi
Enoch 8,144 29.3 mi

More nearby: every ZIP code in Iron County · Utah ZIP codes

Cite this page

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

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