84330 ZIP Code — Plymouth, UT

Box Elder County, Utah

ZIP code 84330 is located in Plymouth, Utah, within Box Elder County. It covers approximately 35.89 square miles and serves a population of 371 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 435.

About ZIP code 84330

The housing stock consists of predominantly single-family detached homes. Most homes were built in the 2000s, giving the area an established character. Median home value is $289,300. Owner-occupancy is high at 96%, well above the national average.

Median household income is $72,917. The poverty rate of 4% is below the national average. 41% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is production, transportation, and material moving, with manufacturing as the leading industry. The average commute of 24 minutes is near the national average.

College attainment at 14% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 84330 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

371
population
35.89
sq mi land
Standard
ZIP type
Mountain (MT)
timezone
84330 ZIP code map
Cities in ZIP code 84330

Below are the cities the US Postal Service accepts for ZIP code 84330. Using any city not on this list may result in mail delivery delays.

City Status
Plymouth Acceptable
Demographics updated 06/2026
Population
Total population 371
Population density 10 / sq mi
State FIPS 49
County FIPS 003
Geography
Land area 35.89 sq mi
Water area 0.00 sq mi
Latitude 41.8903
Longitude -112.1389
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 33.8% 36.1% 31.5%
$50k – $100k 49.0% 38.9% 34.6%
$100k – $200k 13.1% 21.7% 27.0%
Over $200k 4.1% 3.3% 7.0%

Demographics & statistics

371
Population
10
People per sq mi
41.2
Median age
$72,917
Median household income
$34,234
Per capita income
$289,300
Median home value
$0
Median monthly rent
95.6%
Home ownership
3.5%
Poverty rate
1.1%
Unemployment
134
Housing units
13.7%
Bachelor's or higher

Age distribution

Male Female
19
Under 5
22
5
5–9
6
8
10–14
8
9
15–19
10
17
20–24
19
17
25–34
20
21
35–44
23
20
45–54
22
21
55–59
23
9
60–64
11
19
65–74
21
8
75–84
10
1
85+
2
← Male
Female →

Age summary

GroupCount%
Under 188322.4%
18 and over28877.6%
65 and over6116.4%
Median age41.2 years

Race & ethnicity

White 89.8%
Two or more races 9.1%
Hispanic or Latino 0.5%
Other race 0.5%
GroupCount%
White33589.8%
Two or more races349.1%
Hispanic or Latino20.5%
Other race20.5%

Household income

Income range This ZIP County avg State avg
Under $50k 33.8% 36.1% 31.5%
$50k – $100k 49.0% 38.9% 34.6%
$100k – $200k 13.1% 21.7% 27.0%
Over $200k 4.1% 3.3% 7.0%
Under $10k 0.7%
$10k–$15k 2.2%
$15k–$25k 5.2%
$25k–$35k 10.4%
$35k–$50k 5.2%
$50k–$75k 28.1%
$75k–$100k 18.5%
$100k–$150k 14.8%
$150k–$200k 11.1%
$200k+ 3.7%
Range% of households
Under $10k0.7%
$10k–$15k2.2%
$15k–$25k5.2%
$25k–$35k10.4%
$35k–$50k5.2%
$50k–$75k28.1%
$75k–$100k18.5%
$100k–$150k14.8%
$150k–$200k11.1%
$200k+3.7%
Median income$72,917

Housing

Home values

Under $50k 5.4%
$50k–$100k 0.8%
$100k–$150k 1.6%
$150k–$200k 10.1%
$200k–$300k 33.3%
$300k–$500k 29.5%
$500k–$1M 10.1%
$1M+ 9.3%

Housing overview

MetricValue
Median home value$289,300
Median rent / month$0
Owner occupied95.6%
Renter occupied4.4%
Vacant3.6%
Single-family detached95.0%
Large apartment buildings0.0%
Mobile homes5.0%
Median rooms6.3
Avg household size (owned)2.74

Year built

Era%
2020 or later0.0%
2010–20196.4%
2000–200926.4%
1990–199913.6%
1980–19898.6%
1970–197910.7%
1960–19698.6%
1950–19598.6%
1940–19491.4%
1939 or earlier15.7%

Bedrooms

Size% of units
No bedroom (studio)0.0%
1 bedroom0.0%
2 bedrooms18.6%
3 bedrooms47.9%
4 bedrooms28.6%
5+ bedrooms5.0%

Vehicles per household

Vehicles% of households
No vehicle0.7%
1 vehicle17.8%
2 vehicles31.1%
3 or more50.4%

Heating fuel

Fuel type%
Utility gas71.9%
Electricity10.4%
Propane / LP gas8.9%
Wood6.7%

Households & families

Household typeCount%
Married-couple family8361.5%
Cohabiting couple75.2%
Male householder, no spouse2014.8%
Female householder, no spouse2518.5%
Households with children under 183828.1%
Households with seniors (65+)4331.9%
Average household size2.75

Marital status

StatusMaleFemale
Never married18.1%22.4%
Married65.2%50.3%
Separated0.0%2.4%
Widowed2.2%9.7%
Divorced14.5%15.2%

Education

Less than 9th grade 0.0%
Some HS, no diploma 10.5%
HS graduate 46.8%
Some college, no degree 25.4%
Associate's degree 3.6%
Bachelor's degree 8.5%
Graduate / professional 5.2%
Metric%
HS diploma or higher89.5%
Bachelor's or higher13.7%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool1318.1%
Kindergarten11.4%
Elementary school2534.7%
High school1419.4%
College / grad school1926.4%

Employment

Industry of employment

Manufacturing 38.7%
Education & healthcare 14.9%
Retail trade 12.7%
Transportation & utilities 8.8%
Arts, food & hospitality 6.6%
Construction 6.1%
Professional & management 3.9%
Public administration 3.9%
Agriculture & mining 3.3%
Wholesale trade 1.1%

Occupation

Category%
Management, business & arts17.1%
Service19.9%
Sales & office20.4%
Natural resources & construction12.2%
Production & transportation30.4%

Employment type

Type%
Private sector89.0%
Government7.7%
Self-employed2.8%
Unpaid family workers0.6%

Commute

Method%
Drive alone84.9%
Carpool3.9%
Public transit0.0%
Walk0.0%
Work from home7.8%
Other means3.4%
Avg commute (minutes)23.8

Poverty

All people 3.5%
Under 18 years 6.0%
18 and over 2.8%
Married-couple families 4.8%
Female-led households 0.0%

Income support

Source% of households
Social Security40.7%
Retirement income31.1%
Supplemental Security14.1%
Cash public assistance1.5%
Food stamps / SNAP3.0%

Health indicators

Condition%
Obesity32.9%
High blood pressure29.0%
High cholesterol30.9%
Diabetes9.0%
Heart disease5.8%
Stroke2.7%
Asthma10.8%
Arthritis26.9%
Kidney disease2.6%
Pulmonary disease5.9%
Cancer6.1%
Behavior / access%
Smoking12.2%
Binge drinking11.1%
No physical activity18.6%
Less than 7 hrs sleep34.2%
Depression25.1%
Fair or poor health12.6%
Poor mental health15.6%
Poor physical health10.2%
No health insurance12.9%
Visited doctor (checkup)69.8%
Visited dentist69.3%
Cholesterol screening85.5%
Teeth loss12.6%

Veterans & disability

VeteransCount%
Civilian veterans144.9%
Disability%
Any disability11.6%
Under 183.6%
18–64 years9.7%
65 and over29.5%

Health insurance coverage

Type%
Private insurance77.9%
Public insurance29.9%
No insurance3.8%
Uninsured under 190.0%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only33088.9%
Spanish51.5%
Other Indo-European51.5%
Asian & Pacific Islander00.0%
Other languages00.0%

Place of birth & citizenship

OriginCount%
Native born (US)36999.5%
Born in same state36798.9%
Born in different state26972.5%
Foreign born20.5%
Naturalized citizen20.5%
Not a US citizen150.0%

Ancestry

AncestryCount%
French7821%
Arab369.7%
Italian308.1%
AncestryCount%
Polish246.5%
Dutch61.6%
English41.1%

Technology access

Metric% of households
Computer access36.4%
Internet access97.0%

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

Frequently asked questions about ZIP code 84330

What city is ZIP code 84330 in?

ZIP code 84330 is primarily assigned to Plymouth, Utah.

What county is ZIP code 84330 in?

ZIP code 84330 falls within Box Elder County, Utah.

Is ZIP code 84330 mostly owner-occupied?

96% of occupied units in ZIP code 84330 are owner-occupied, well above the national average.

How educated is the population of ZIP code 84330?

14% of residents hold a bachelor's degree or higher — below the national average of ~33%, consistent with a trades-oriented local economy.

Does ZIP code 84330 have a large retiree population?

41% of households in ZIP code 84330 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 84330?

ZIP code 84330 has an estimated population of 371 residents, with a density of 10 people per square mile.

What timezone is ZIP code 84330 in?

ZIP code 84330 observes the MST timezone.

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