Newcastle is a community in Iron County, Utah, home to about 367 people across 4.0 square miles. Its ZIP code is 84756.
Homes sold for a median of $154 per square foot in the three months ending August 2026, a buyer’s market.
Each card is that ZIP code’s whole market, including any part outside Newcastle. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Newcastle’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Harry Reid International Airport (LAS)139 miles away |
|---|---|
| Closer regional airport | Cedar City Regional Airport (CDC)29 miles away |
| Nearest city of 250,000+ | North Las Vegas, NV126 miles away |
| Nearest city of 1 million+ | Los Angeles, CA369 miles away |
Straight-line distances from the center of Newcastle; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Newcastle had 330 residents in the 2020 census, up 34% since 2010.
It’s the 253rd largest of 325 towns in Utah by population.
Iron County grew from 3,546 residents in 1900 to 57,289 in 2020.
Iron County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 90°F in summer, and winter lows average 17°F. About 15.2 inches of rain and melted snow fall in a typical year, with about 25 inches of snow.
Source: NOAA 1991–2020 climate normals, Enterprise, UT weather station (9 miles away).
18,547 jobs at 1,935 businesses in Iron County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
Nearest hospitals
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.