US ZIP Code
83421

Chester, ID

Fremont County  ·  Idaho

● Active
👥 346 Population ↓ 3% since 2019
💰 $80,438 Median HH Income
≈ Avg
🎂 44.0 Median Age ↑ 46% since 2019
🏠 $264,200 Median Home Value
≈ Avg ↑ 65% since 2019
🎓 24.6% College Grads
▼ 36% below avg
📊 0.0% Unemployment
▼ 100% below avg
ZIP Code Details
ZIP Code83421
CityChester
StateIdaho (ID)
CountyFremont County
Area Code208/986
Elevation5,103 ft
Latitude44.00188
Longitude-111.547316
TimezoneBoise (DST)
FIPS16043
ZIP TypePO Box
StatusActive
People & Population (ACS 2023)
♂ Male 54.1% (187) Female 46.0% (159) ♀

Race & Ethnicity

White: 100%Race
White100.0%

Age Breakdown

Under 5
11%
5–17
15%
25–44
24%
45–64
20%
65+
21%

Key Indicators

Median Age44.0 yrs ↑ 46% since 2019
Avg Household Size2.19
Below Poverty0.0% ▼ 100% below avg
College Grads24.6% ▼ 36% below avg
Unemployment0.0% ▼ 100% below avg
HS Graduate71 (27.7%)
Some College43 (16.8%)
Associates79 (30.9%)
Bachelors48 (18.8%)
Graduate Degree15 (5.9%)

Education

HS Grad: 27.7%Some College: 16.8%Associates: 30.9%Bachelors: 18.8%Graduate: 5.9%Edu
HS Grad27.7%
Some College16.8%
Associates30.9%
Bachelors18.8%
Graduate5.9%
Housing & Income

Housing Tenure

Owner: 100%Tenure
Owner100.0%

Home Value Distribution

$100k–150k
25%
$150k–200k
14%
$200k–300k
38%
$300k–500k
13%
Over $500k
9%

Financials

Median HH Income$80,438 ≈ Avg
Median Home Value$264,200 ≈ Avg ↑ 65% since 2019
Home/Income Ratio3.3x (nat avg ~3.5x)
Total Units192
Vacant Units34
Avg HH Size2.19

Income Distribution

$50k–75k
46%
$75k–100k
25%
$100k–150k
13%
$150k–200k
9%
Over $200k
6%
Employment & Commute

How People Get to Work

Drove Alone
100%

Commute Time

Under 15 min
29%
15–30 min
21%
Over 45 min
50%
Housing Stock

Year Built

1960s–1970s
22%
1980s–1990s
16%
2000+
61%

Summary

Total Units192
Vacant34
Owner Occupied100.0%
Renter Occupied0.0%
Avg HH Size2.19
Frequently Asked Questions
ZIP code 83421 is in Chester, ID, in Fremont County.
ZIP code 83421 is located in Idaho (ID).
ZIP code 83421 is in Fremont County, ID.
ZIP 83421 observes the Boise timezone. Daylight Saving Time is observed.
The estimated population of ZIP code 83421 is 346 people (ACS 2023).
The median household income in ZIP code 83421 is $80,438 (ACS 2023).
The median home value in ZIP 83421 is $264,200 (ACS 2023).
About ZIP Code 83421

ZIP code 83421 is located in Chester, Idaho, within Fremont County. With a population of 346, this is a sparsely populated ZIP code with a middle-aged community — the median age is 44 years. Economically, 83421 is a middle-income ZIP code: the median household income of $80,438 is near the national average.

Real estate in ZIP code 83421 represents a mid-range housing market. The median home value of $264,200 is near the national average. Median home values have increased by 65% since 2019.

The population of 83421 is primarily White (100.00%). Residents are less-educated — 24.6% hold a bachelor's degree or higher, which is below the national average.

Overall, ZIP code 83421 in Chester, ID is characterized as middle-income, less-educated, a middle-aged community, and predominantly owner-occupied. With 346 residents, a median household income of $80,438, and a median home value of $264,200, it offers a clear picture of life in this part of Idaho.