83431 ZIP Code — Lewisville, ID

Jefferson County, Idaho

ZIP code 83431 is located in Lewisville, Idaho, within Jefferson County. It covers approximately 12.53 square miles and serves a population of 879 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 208/986.

About ZIP code 83431

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $223,700. Owner-occupancy is high at 77%, well above the national average.

The gap between median ($70,568) and mean household income suggests income inequality — a small number of higher earners pull the average up. 48% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 18 minutes is near the national average.

College attainment at 15% is below the national average, consistent with a trades and production-oriented local economy.

Overall, ZIP code 83431 reflects a community defined by a trades-oriented workforce, high homeownership, and a significant Social Security-dependent population.

879

population

12.53

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

83431 ZIP code map

Cities in ZIP code 83431

Below are the cities the US Postal Service accepts for ZIP code 83431. Using any city not on this list may result in mail delivery delays.

City	Status
Lewisville	Preferred

Nearby ZIP codes

83434 Menan (4 mi) 83442 Rigby (8.2 mi) 83444 Roberts (8.5 mi) 83401 Idaho Falls (13.8 mi) 83415 Idaho Falls (15.1 mi) 83427 Iona (15.4 mi) 83460 Rexburg (15.5 mi) 83441 Rexburg (15.8 mi) 83402 Idaho Falls (16.1 mi) 83425 Hamer (17.2 mi) 83404 Idaho Falls (18.1 mi) 83440 Rexburg (18.6 mi)

Demographics updated 06/2026

Population
Total population	879
Population density	70 / sq mi
State FIPS	16
County FIPS	051

Geography
Land area	12.53 sq mi
Water area	0.19 sq mi
Latitude	43.6855
Longitude	-112.0390
Timezone	Mountain (MT)
Area code	208/986

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	48.4%	32.3%	41.8%
$50k – $100k	30.9%	42.6%	34.0%
$100k – $200k	17.9%	19.9%	19.5%
Over $200k	2.8%	5.1%	4.7%

Demographics & statistics

879

Population

People per sq mi

36.3

Median age

$70,568

Median household income

$32,163

Per capita income

$223,700

Median home value

$919

Median monthly rent

76.7%

Home ownership

9.4%

Poverty rate

3.7%

Unemployment

233

Housing units

15.2%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

65–74

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	286	32.5%
18 and over	593	67.5%
65 and over	150	17.1%
Median age	36.3 years

Race & ethnicity

White 57.1%

Hispanic or Latino 21%

Other race 20%

Two or more races 1.6%

American Indian / Alaska Native 0.3%

Group	Count	%
White	635	57.1%
Hispanic or Latino	234	21%
Other race	223	20%
Two or more races	18	1.6%
American Indian / Alaska Native	3	0.3%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	48.4%	32.3%	41.8%
$50k – $100k	30.9%	42.6%	34.0%
$100k – $200k	17.9%	19.9%	19.5%
Over $200k	2.8%	5.1%	4.7%

Under $10k 1.4%

$10k–$15k 0.7%

$15k–$25k 12.5%

$25k–$35k 4.3%

$35k–$50k 20.4%

$50k–$75k 13.6%

$75k–$100k 19.4%

$100k–$150k 16.8%

$150k–$200k 5.0%

$200k+ 5.7%

Range	% of households
Under $10k	1.4%
$10k–$15k	0.7%
$15k–$25k	12.5%
$25k–$35k	4.3%
$35k–$50k	20.4%
$50k–$75k	13.6%
$75k–$100k	19.4%
$100k–$150k	16.8%
$150k–$200k	5.0%
$200k+	5.7%
Median income	$70,568

Housing

Home values

$50k–$100k 5.6%

$100k–$150k 1.9%

$150k–$200k 21.0%

$200k–$300k 54.7%

$300k–$500k 13.1%

$500k–$1M 3.7%

Housing overview

Metric	Value
Median home value	$223,700
Median rent / month	$919
Owner occupied	76.7%
Renter occupied	23.3%
Vacant	6.4%
Single-family detached	83.2%
Large apartment buildings	0.0%
Mobile homes	16.8%
Median rooms	6.5
Avg household size (owned)	2.80

Year built

Era	%
2020 or later	0.0%
2010–2019	12.1%
2000–2009	6.4%
1990–1999	18.1%
1980–1989	6.0%
1970–1979	13.4%
1960–1969	5.4%
1950–1959	9.7%
1940–1949	5.4%
1939 or earlier	23.5%

Bedrooms

Size	% of units
No bedroom (studio)	0.0%
1 bedroom	0.7%
2 bedrooms	25.5%
3 bedrooms	44.3%
4 bedrooms	19.1%
5+ bedrooms	10.4%

Vehicles per household

Vehicles	% of households
No vehicle	2.9%
1 vehicle	15.4%
2 vehicles	26.2%
3 or more	55.6%

Heating fuel

Fuel type	%
Utility gas	35.1%
Electricity	34.1%
Propane / LP gas	21.9%
Wood	4.3%

Households & families

Household type	Count	%
Married-couple family	133	47.7%
Cohabiting couple	40	14.3%
Male householder, no spouse	51	18.3%
Female householder, no spouse	55	19.7%
Households with children under 18	117	41.9%
Households with seniors (65+)	119	42.7%
Average household size	3.15

Marital status

Status	Male	Female
Never married	34.7%	30.1%
Married	47.1%	46.2%
Separated	0.6%	0.0%
Widowed	0.0%	12.5%
Divorced	17.6%	11.2%

Education

Less than 9th grade 16.7%

Some HS, no diploma 5.8%

HS graduate 29.2%

Some college, no degree 26.1%

Associate's degree 7.1%

Bachelor's degree 10.9%

Graduate / professional 4.2%

Metric	%
HS diploma or higher	77.5%
Bachelor's or higher	15.2%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	11	3.7%
Kindergarten	7	2.3%
Elementary school	184	61.3%
High school	62	20.7%
College / grad school	36	12.0%

Employment

Industry of employment

Education & healthcare 17.4%

Agriculture & mining 17.1%

Manufacturing 15.8%

Arts, food & hospitality 13.0%

Transportation & utilities 8.4%

Professional & management 7.1%

Public administration 5.7%

Construction 5.2%

Retail trade 4.6%

Other services 3.0%

Finance & real estate 2.2%

Wholesale trade 0.5%

Occupation

Category	%
Management, business & arts	41.3%
Service	13.0%
Sales & office	11.4%
Natural resources & construction	17.9%
Production & transportation	16.3%

Employment type

Type	%
Private sector	73.1%
Government	15.8%
Self-employed	11.1%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	69.8%
Carpool	9.0%
Public transit	1.1%
Walk	13.0%
Work from home	6.0%
Other means	1.1%
Avg commute (minutes)	17.9

Poverty

All people 9.4%

Under 18 years 4.9%

18 and over 11.6%

Married-couple families 3.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	48.0%
Retirement income	19.0%
Supplemental Security	3.6%
Cash public assistance	0.0%
Food stamps / SNAP	3.9%

Health indicators

Condition	%
Obesity	36.9%
High blood pressure	31.1%
High cholesterol	33.1%
Diabetes	9.5%
Heart disease	6.4%
Stroke	3.0%
Asthma	9.7%
Arthritis	23.8%
Kidney disease	2.8%
Pulmonary disease	6.6%
Cancer	6.8%

Behavior / access	%
Smoking	16.2%
Binge drinking	14.1%
No physical activity	22.1%
Less than 7 hrs sleep	29.7%
Depression	19.5%
Fair or poor health	13.4%
Poor mental health	13.7%
Poor physical health	10.8%
No health insurance	16.2%
Visited doctor (checkup)	69.3%
Visited dentist	67.8%
Cholesterol screening	86.4%
Teeth loss	13.8%

Veterans & disability

Veterans	Count	%
Civilian veterans	43	7.3%

Disability	%
Any disability	12.9%
Under 18	7.0%
18–64 years	12.9%
65 and over	24.0%

Health insurance coverage

Type	%
Private insurance	58.9%
Public insurance	48.6%
No insurance	11.0%
Uninsured under 19	3.2%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	835	95.0%
Spanish	86	10.3%
Other Indo-European	86	10.3%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	781	88.9%
Born in same state	781	88.9%
Born in different state	683	77.7%
Foreign born	0	0.0%
Naturalized citizen	98	11.1%
Not a US citizen	10	10.2%

Ancestry

Ancestry	Count	%
French	191	21.7%
English	46	5.2%
Arab	44	5%
Italian	29	3.3%

Ancestry	Count	%
Dutch	24	2.7%
Polish	15	1.7%
German	11	1.3%
Irish	4	0.5%

Technology access

Metric	% of households
Computer access	31.7%
Internet access	84.9%

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

Frequently asked questions about ZIP code 83431

What city is ZIP code 83431 in?

ZIP code 83431 is primarily assigned to Lewisville, Idaho.

What county is ZIP code 83431 in?

ZIP code 83431 falls within Jefferson County, Idaho.

Is ZIP code 83431 family-oriented?

33% of residents in ZIP code 83431 are under 18, reflecting a younger, family-oriented community.

Does ZIP code 83431 have a large retiree population?

48% of households in ZIP code 83431 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 83431?

ZIP code 83431 has an estimated population of 879 residents, with a density of 70 people per square mile.

What is the typical home value in ZIP code 83431?

The median home value in ZIP code 83431 is $223,700.

What timezone is ZIP code 83431 in?

ZIP code 83431 observes the MST timezone.