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83421
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  3. ZIP Code 83421
Idaho (ID)Fremont CountyRexburg208986

ZIP Code 83421 — Chester, ID

Fremont County * Rexburg metro

Compare

220

Population

$282.4K

Home value

0.0%

Poverty rate

What stands out

  • Median home value: $282.4K.
  • Poverty rate: 0.0% (low poverty; bottom 10% vs US ZIP codes).

Categories vs U.S.

Economy

2 of 3 metrics better than U.S. benchmarks

Per-capita income

$125.4K

U.S.

$45K

Median home value

$282.4K

U.S.

$333K

Housing stress

Income distribution

Share of households by income bracket (ACS).

< $50k
0.0%
$50–100k
53.0%
$100–200k
31.3%
$200k+
15.7%

Health

5 of 6 available metrics better than U.S.

CDC PLACES modeled ZCTA-level estimates (adult prevalence).

Obesity

33.1%

U.S.

33.3%

Diabetes

11.9%

U.S.

12.0%

Current smoking

13.9%

U.S.

13.1%

Connectivity

0 of 3 metrics better than U.S.

Best available speed

1,000Mbps

Gigabit speeds reported

100+ Mbps coverage

39.2%

U.S.

85.3%

Gigabit ready

1.9%

U.S.

8.6%

5G available

71.6%

U.S.

77.4%

Learning

Education metrics come from ACS 5-year estimates for ZIP Code Tabulation Areas (ZCTAs).

Bachelor's degree+ (age 25+)

7.7%

U.S.

35.7%

ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as noise.

School districts

Fremont County Joint School District 215

Map

ZIP 83421

Chester, ID

Population

220

Area

11.7 sq mi

Density

18.8/sq mi

Neighbors

8342083445
More Details

Census Tracts

2 tracts overlap this ZIP. Hover over segments to explore.

64%
36%

Tract 9702

64.3%

Tract 9703.02

35.7%

Total tracts: 2Coverage: 100.0%

Representation

U.S. House

ZIP codes can span multiple congressional districts. Overlap percentages are approximate by land area. Verify by address.

100%

ID-2

100%

Districts: 1Coverage: 100.0%

Data freshness

ACS 5-Year
2020–2024
CDC PLACES
2025
Broadband
2020-12
Mobile
2025-11-24
Page Updated
2026-02-23

Release schedule and upstream dates: Sources.

Data sources

US Census Bureau (ACS 5-year)HUD USPS ZIP crosswalkUS Census TIGER/Line (geometry inputs)US Census TIGER/Line (school districts)US Census Bureau (ZCTA-to-tract relationship, 2020)US Census Bureau (2020 ZCTA-to-congressional-district relationship file, CD119)CDC PLACES (ZCTA)FCC (Form 477 broadband)FCC (Mobile Broadband Data Collection)

Derived statistics

  • ZIP pages use Census ZIP Code Tabulation Areas (ZCTAs), not USPS delivery routes.
  • Population density is computed as population ÷ land area.
  • Overlap percentages (tracts and districts) are derived from map geometry and are approximate.

Data accuracy & methodology

ZIP pages combine 2020–2024 ACS 5-year ZCTA estimates with other public datasets when available (see Sources). Connectivity metrics use FCC coverage data, not ACS. ZIP-level estimates can have higher margins of error than county/state totals; treat small differences as statistical noise rather than precise changes.