Chester, ID · standard
ZIP Code 83421
Fremont County, Idaho - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 319
- 9/sq mi Low-density area
- $282,400
- Median home value Near-median home value
- 7.6%
- Bachelor's or higher Below-average bachelor's attainment
National ZIP placement
Chester pairs above-median home values, in a rural, homeowner-dominated area.
- Top 36%
- home value, US ZIPs
- 9
- people per sq mi
- 100%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 83421 against every reporting US ZIP.
ZIP code 83421 is a sparsely populated ZIP (a standard USPS delivery area) in Chester, Fremont County, Idaho, home to just 319 residents across 37.1 square miles, a density of 9 people per square mile, in the Boise time zone.
Median household income is not on file for ZIP 83421, but per-capita income is $125,365. Both reported hardship measures are comparatively low in absolute terms: poverty is 0.0% and unemployment is 0.0%. Home values sit below the statewide ZIP benchmark: the median is $282,400 (25% below the average Idaho ZIP); owner occupancy is 100.0%.
Formal educational attainment runs low here: just 7.6% of adults hold a bachelor's degree or higher, the median age is 62.4, and the average commute is -. The page also surfaces 2 ZIP codes within roughly 10 miles and 6 more in Fremont County, so 83421 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 83421, Chester, ID · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
319
Population
37.1
Area (sq mi)
9
People / sq mi
Boise
Time Zone
standard
ZIP Type
Who lives in ZIP 83421?
62.4
Median Age
60.0%
Male
40.0%
Female
0.0%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$125,365
Per Capita Income
0.0%
Poverty Rate
0.0%
Unemployment Rate
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
148housing units
148
Total Housing Units
115
Occupied Units
33
Vacant Units
1.91
Avg Household Size
Occupancy Type
$282,400
Median Home Value
-25% vs state ZIP avg
1979
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 6 business establishments in ZIP 83421, employing approximately 19 people with a combined annual payroll of $837,000.
6
Businesses
19
Employees
$837K
Annual Payroll
1
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 3 | 50.0% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 83421 vs 83436 →
ZIP 83421 vs its nearest neighbors, by population
Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 83451
Teton (83451)
791 residents
- 83436
Newdale (83436)
491 residents
- 83421
Chester (83421)
319 residents
What this shows Among its immediate neighbors, ZIP 83421 ranks #3 by population - useful context the national average alone can't give.
More ZIP Codes in Fremont County
Related Areas
Frequently Asked Questions
What county is ZIP code 83421 in?
ZIP code 83421 (Chester) is located in Fremont County, Idaho. Fremont County contains multiple ZIP codes, see the full list at /counties/fremont-id.
What is the population of ZIP code 83421?
ZIP code 83421 in Chester, ID has a population of 319 according to the Census Bureau ACS 2023 estimates.
What is the average home value in ZIP 83421?
The median home value in ZIP 83421 is $282,400, which is 2% above the national average of $278,155.
What is the demographic makeup of ZIP 83421?
The largest racial group in ZIP 83421 is White at 100.0%.
How many businesses are in ZIP code 83421?
ZIP code 83421 has 6 business establishments employing approximately 19 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What is the education level in ZIP code 83421?
In ZIP code 83421, 48.8% of residents aged 25+ have a high school diploma or higher, and 7.6% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
Related
Take this with you
What to do with ZIP 83421's numbers, next.
- See how ZIP 83421 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Chester, ID ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.