84756 ZIP Code — Newcastle, UT

Iron County, Utah

ZIP code 84756 is located in Newcastle, Utah, within Iron County. It covers approximately 71.09 square miles and serves a population of 360 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 435.

About ZIP code 84756

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 1980s, giving the area an established character. Median home value is $208,300.

The dominant occupation class is management, business, and professional, with agriculture and mining as the leading industry.

College attainment at 21% is below the national average, consistent with a trades and production-oriented local economy.

Notable community characteristics include disability rates above the national average at 41%.

Overall, ZIP code 84756 reflects a community defined by high homeownership, a significant Social Security-dependent population, and elevated reliance on food assistance.

360

population

71.09

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

84756 ZIP code map

Cities in ZIP code 84756

Below are the cities the US Postal Service accepts for ZIP code 84756. Using any city not on this list may result in mail delivery delays.

City	Status
Newcastle	Acceptable

Demographics updated 06/2026

Population
Total population	360
Population density	5 / sq mi
State FIPS	49
County FIPS	021

Geography
Land area	71.09 sq mi
Water area	0.00 sq mi
Latitude	37.8766
Longitude	-113.6473
Timezone	Mountain (MT)
Area code	435

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	56.7%	47.8%	31.5%
$50k – $100k	43.3%	33.8%	34.6%
$100k – $200k	0.0%	16.2%	27.0%
Over $200k	0.0%	2.1%	7.0%

Demographics & statistics

360

Population

People per sq mi

60.6

Median age

Median household income

$21,986

Per capita income

$208,300

Median home value

Median monthly rent

100.0%

Home ownership

6.9%

Poverty rate

28.1%

Unemployment

117

Housing units

20.6%

Bachelor's or higher

Age distribution

Male Female

10–14

15–19

35–44

45–54

60–64

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	28	7.8%
18 and over	332	92.2%
65 and over	142	39.4%
Median age	60.6 years

Race & ethnicity

White 100%

Group	Count	%
White	360	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	56.7%	47.8%	31.5%
$50k – $100k	43.3%	33.8%	34.6%
$100k – $200k	0.0%	16.2%	27.0%
Over $200k	0.0%	2.1%	7.0%

$10k–$15k 23.8%

$25k–$35k 32.4%

$35k–$50k 14.3%

$75k–$100k 19.0%

$200k+ 10.5%

Range	% of households
$10k–$15k	23.8%
$25k–$35k	32.4%
$35k–$50k	14.3%
$75k–$100k	19.0%
$200k+	10.5%
Median income	$0

Housing

Home values

Under $50k 32.4%

$100k–$150k 10.5%

$200k–$300k 42.9%

$300k–$500k 14.3%

Housing overview

Metric	Value
Median home value	$208,300
Median rent / month	$0
Owner occupied	100.0%
Renter occupied	0.0%
Vacant	10.3%
Single-family detached	89.7%
Large apartment buildings	0.0%
Mobile homes	10.3%
Median rooms	5.1
Avg household size (owned)	3.43

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	0.0%
1990–1999	23.1%
1980–1989	29.1%
1970–1979	17.1%
1960–1969	21.4%
1950–1959	0.0%
1940–1949	9.4%
1939 or earlier	0.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.0%
2 bedrooms	61.5%
3 bedrooms	29.1%
4 bedrooms	9.4%
5+ bedrooms	0.0%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	23.8%
2 vehicles	46.7%
3 or more	29.5%

Heating fuel

Fuel type	%
Utility gas	43.8%
Electricity	56.2%

Households & families

Household type	Count	%
Married-couple family	31	29.5%
Cohabiting couple	0	0.0%
Male householder, no spouse	40	38.1%
Female householder, no spouse	34	32.4%
Households with children under 18	11	10.5%
Households with seniors (65+)	80	76.2%
Average household size	3.43

Marital status

Status	Male	Female
Never married	7.5%	22.8%
Married	27.0%	33.3%
Separated	0.0%	0.0%
Widowed	0.0%	0.0%
Divorced	65.5%	43.9%

Education

Less than 9th grade 0.0%

Some HS, no diploma 13.2%

HS graduate 39.5%

Some college, no degree 26.7%

Associate's degree 0.0%

Bachelor's degree 20.6%

Graduate / professional 0.0%

Metric	%
HS diploma or higher	86.8%
Bachelor's or higher	20.6%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	15	22.1%
High school	34	50.0%
College / grad school	19	27.9%

Employment

Industry of employment

Agriculture & mining 35.6%

Transportation & utilities 25.3%

Education & healthcare 20.7%

Manufacturing 18.4%

Occupation

Category	%
Management, business & arts	56.3%
Service	0.0%
Sales & office	0.0%
Natural resources & construction	0.0%
Production & transportation	43.7%

Employment type

Type	%
Private sector	43.7%
Government	20.7%
Self-employed	35.6%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	87.4%
Carpool	0.0%
Public transit	0.0%
Walk	0.0%
Work from home	12.6%
Other means	0.0%
Avg commute (minutes)	0.0

Poverty

All people 6.9%

Under 18 years 0.0%

18 and over 7.5%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	100.0%
Retirement income	14.3%
Supplemental Security	32.4%
Cash public assistance	0.0%
Food stamps / SNAP	32.4%

Health indicators

Condition	%
Obesity	27.8%
High blood pressure	28.2%
High cholesterol	33.3%
Diabetes	9.4%
Heart disease	5.7%
Stroke	2.9%
Asthma	10.8%
Arthritis	25.2%
Kidney disease	2.8%
Pulmonary disease	6.4%
Cancer	5.9%

Behavior / access	%
Smoking	12.6%
Binge drinking	11.3%
No physical activity	18.4%
Less than 7 hrs sleep	32.6%
Depression	24.9%
Fair or poor health	14.4%
Poor mental health	15.3%
Poor physical health	11.2%
No health insurance	16.2%
Visited doctor (checkup)	66.4%
Visited dentist	66.3%
Cholesterol screening	84.8%
Teeth loss	14.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	32	9.6%

Disability	%
Any disability	40.8%
Under 18	0.0%
18–64 years	28.4%
65 and over	65.5%

Health insurance coverage

Type	%
Private insurance	26.4%
Public insurance	70.6%
No insurance	6.1%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	360	100.0%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	360	100.0%
Born in same state	360	100.0%
Born in different state	207	57.5%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	265	73.6%

Ancestry	Count	%
Italian	125	34.7%

Technology access

Metric	% of households
Computer access	29.2%
Internet access	61.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions about ZIP code 84756

What city is ZIP code 84756 in?

ZIP code 84756 is primarily assigned to Newcastle, Utah.

What county is ZIP code 84756 in?

ZIP code 84756 falls within Iron County, Utah.

Does ZIP code 84756 have a large retiree population?

100% of households in ZIP code 84756 receive Social Security income, suggesting a significant retiree or disability population.

Does ZIP code 84756 have an older population?

39% of residents in ZIP code 84756 are 65 or older, above the national average of ~17%.

Does ZIP code 84756 have a large veteran population?

10% of civilians in ZIP code 84756 are veterans, above the national average of ~7%.

What is the population of ZIP code 84756?

ZIP code 84756 has an estimated population of 360 residents, with a density of 5 people per square mile.

What timezone is ZIP code 84756 in?

ZIP code 84756 observes the MST timezone.