83420 ZIP Code — Ashton, ID

Fremont County, Idaho

ZIP code 83420 is located in Ashton, Idaho, within Fremont County. It covers approximately 410.77 square miles and serves a population of 2,737 residents. This is a standard ZIP code in the Mountain (MT) timezone, served by area code 208.

About ZIP code 83420

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 $271,700. Owner-occupancy is high at 82%, well above the national average.

Median household income is $64,787. The poverty rate of 4% is below the national average. 40% 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 21 minutes is near the national average.

Educational attainment is near the national average, with 29% of residents holding a bachelor's degree or higher.

Overall, ZIP code 83420 reflects a community defined by high homeownership and a significant Social Security-dependent population.

2,737

population

410.77

sq mi land

Standard

ZIP type

Mountain (MT)

timezone

83420 ZIP code map

Cities in ZIP code 83420

Below are the cities the US Postal Service accepts for ZIP code 83420. Using any city not on this list may result in mail delivery delays.

City	Status
Ashton	Acceptable
Ashton	Preferred

Nearby ZIP codes

83436 Newdale (13.1 mi) 83424 Felt (13.3 mi) 83452 Tetonia (14.3 mi) 83445 Saint Anthony (16.9 mi) 83451 Teton (19.7 mi)

Demographics updated 06/2026

Population
Total population	2,737
Population density	7 / sq mi
State FIPS	16
County FIPS	043

Geography
Land area	410.77 sq mi
Water area	4.28 sq mi
Latitude	44.0445
Longitude	-111.3280
Timezone	Mountain (MT)
Area code	208

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	42.6%	42.4%	41.8%
$50k – $100k	42.4%	37.8%	34.0%
$100k – $200k	14.0%	18.3%	19.5%
Over $200k	1.0%	1.5%	4.7%

Demographics & statistics

2,737

Population

People per sq mi

47.2

Median age

$64,787

Median household income

$30,312

Per capita income

$271,700

Median home value

$781

Median monthly rent

82.2%

Home ownership

4.0%

Poverty rate

5.2%

Unemployment

1,163

Housing units

28.5%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

116

10–14

101

15–19

100

20–24

25–34

232

35–44

203

185

45–54

162

128

55–59

111

123

60–64

108

175

65–74

153

143

75–84

124

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	496	18.1%
18 and over	2,241	81.9%
65 and over	634	23.2%
Median age	47.2 years

Race & ethnicity

White 89.2%

Two or more races 6.2%

Hispanic or Latino 3.9%

Black or African American 0.3%

American Indian / Alaska Native 0.3%

Other race 0.1%

Group	Count	%
White	2,541	89.2%
Two or more races	177	6.2%
Hispanic or Latino	111	3.9%
Black or African American	9	0.3%
American Indian / Alaska Native	8	0.3%
Other race	2	0.1%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	42.6%	42.4%	41.8%
$50k – $100k	42.4%	37.8%	34.0%
$100k – $200k	14.0%	18.3%	19.5%
Over $200k	1.0%	1.5%	4.7%

Under $10k 2.0%

$15k–$25k 12.4%

$25k–$35k 1.9%

$35k–$50k 14.2%

$50k–$75k 25.4%

$75k–$100k 16.5%

$100k–$150k 18.3%

$150k–$200k 7.5%

$200k+ 2.0%

Range	% of households
Under $10k	2.0%
$15k–$25k	12.4%
$25k–$35k	1.9%
$35k–$50k	14.2%
$50k–$75k	25.4%
$75k–$100k	16.5%
$100k–$150k	18.3%
$150k–$200k	7.5%
$200k+	2.0%
Median income	$64,787

Housing

Home values

Under $50k 6.5%

$50k–$100k 3.3%

$100k–$150k 9.1%

$150k–$200k 12.0%

$200k–$300k 25.6%

$300k–$500k 32.1%

$500k–$1M 9.3%

$1M+ 2.1%

Housing overview

Metric	Value
Median home value	$271,700
Median rent / month	$781
Owner occupied	82.2%
Renter occupied	17.8%
Vacant	27.6%
Single-family detached	85.0%
Large apartment buildings	0.0%
Mobile homes	12.4%
Median rooms	5.7
Avg household size (owned)	2.71

Year built

Era	%
2020 or later	0.7%
2010–2019	2.7%
2000–2009	10.5%
1990–1999	10.4%
1980–1989	12.6%
1970–1979	19.2%
1960–1969	9.7%
1950–1959	7.5%
1940–1949	6.7%
1939 or earlier	20.0%

Bedrooms

Size	% of units
No bedroom (studio)	0.7%
1 bedroom	9.7%
2 bedrooms	21.6%
3 bedrooms	39.8%
4 bedrooms	15.7%
5+ bedrooms	12.5%

Vehicles per household

Vehicles	% of households
No vehicle	0.4%
1 vehicle	21.4%
2 vehicles	31.3%
3 or more	46.9%

Heating fuel

Fuel type	%
Utility gas	1.8%
Electricity	30.4%
Propane / LP gas	42.8%
Fuel oil	10.2%
Wood	12.4%

Households & families

Household type	Count	%
Married-couple family	723	74.8%
Cohabiting couple	29	3.0%
Male householder, no spouse	119	12.3%
Female householder, no spouse	95	9.8%
Households with children under 18	263	27.2%
Households with seniors (65+)	355	36.7%
Average household size	2.79

Marital status

Status	Male	Female
Never married	18.4%	10.5%
Married	73.1%	75.8%
Separated	0.0%	0.4%
Widowed	0.7%	4.0%
Divorced	7.9%	9.3%

Education

Less than 9th grade 4.9%

Some HS, no diploma 1.4%

HS graduate 23.7%

Some college, no degree 28.8%

Associate's degree 12.8%

Bachelor's degree 24.4%

Graduate / professional 4.1%

Metric	%
HS diploma or higher	93.8%
Bachelor's or higher	28.5%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	12	2.2%
Kindergarten	18	3.3%
Elementary school	359	66.4%
High school	81	15.0%
College / grad school	71	13.1%

Employment

Industry of employment

Education & healthcare 22.8%

Retail trade 13.9%

Construction 11.6%

Transportation & utilities 11.5%

Agriculture & mining 8.7%

Arts, food & hospitality 8.0%

Public administration 6.0%

Professional & management 5.9%

Wholesale trade 4.6%

Manufacturing 4.3%

Other services 2.0%

Finance & real estate 0.7%

Occupation

Category	%
Management, business & arts	30.4%
Service	18.2%
Sales & office	26.7%
Natural resources & construction	12.8%
Production & transportation	11.9%

Employment type

Type	%
Private sector	70.1%
Government	22.0%
Self-employed	7.9%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	84.6%
Carpool	6.6%
Public transit	0.0%
Walk	2.5%
Work from home	6.1%
Other means	0.2%
Avg commute (minutes)	20.7

Poverty

All people 4.0%

Under 18 years 4.4%

18 and over 3.9%

Married-couple families 4.7%

Female-led households 0.0%

Income support

Source	% of households
Social Security	40.2%
Retirement income	23.3%
Supplemental Security	1.8%
Cash public assistance	1.1%
Food stamps / SNAP	6.3%

Health indicators

Condition	%
Obesity	34.4%
High blood pressure	35.8%
High cholesterol	33.6%
Diabetes	12.2%
Heart disease	8.5%
Stroke	4.0%
Asthma	9.9%
Arthritis	28.3%
Kidney disease	3.7%
Pulmonary disease	8.4%
Cancer	7.7%

Behavior / access	%
Smoking	17.9%
Binge drinking	12.8%
No physical activity	26.0%
Less than 7 hrs sleep	31.2%
Depression	19.2%
Fair or poor health	17.6%
Poor mental health	13.7%
Poor physical health	13.2%
No health insurance	18.7%
Visited doctor (checkup)	70.5%
Visited dentist	59.7%
Cholesterol screening	86.8%
Teeth loss	17.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	155	6.9%

Disability	%
Any disability	18.8%
Under 18	16.5%
18–64 years	13.7%
65 and over	34.2%

Health insurance coverage

Type	%
Private insurance	63.9%
Public insurance	42.0%
No insurance	7.8%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	2,685	98.1%
Spanish	139	5.2%
Other Indo-European	139	5.2%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	2,558	93.5%
Born in same state	2,558	93.5%
Born in different state	1,633	59.7%
Foreign born	0	0.0%
Naturalized citizen	179	6.5%
Not a US citizen	61	34.1%

Ancestry

Ancestry	Count	%
French	665	24.3%
Italian	472	17.2%
Arab	163	6%

Ancestry	Count	%
Dutch	102	3.7%
Polish	66	2.4%
English	18	0.7%

Technology access

Metric	% of households
Computer access	35.3%
Internet access	96.0%

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

Frequently asked questions about ZIP code 83420

What city is ZIP code 83420 in?

ZIP code 83420 is primarily assigned to Ashton, Idaho.

What county is ZIP code 83420 in?

ZIP code 83420 falls within Fremont County, Idaho.

Is ZIP code 83420 mostly owner-occupied?

82% of occupied units in ZIP code 83420 are owner-occupied, well above the national average.

Does ZIP code 83420 have a large retiree population?

40% of households in ZIP code 83420 receive Social Security income, suggesting a significant retiree or disability population.

What is the population of ZIP code 83420?

ZIP code 83420 has an estimated population of 2,737 residents, with a density of 7 people per square mile.

What is the median household income in ZIP code 83420?

The median household income in ZIP code 83420 is $64,787, below the national median of ~$75,000.

What timezone is ZIP code 83420 in?

ZIP code 83420 observes the MST timezone.