ZIP Codes of Minidoka County, ID

Population & People
Population & People
Total Population
22,211
Household Income
Household Income
Median Income
$70,880
Housing
Housing
Total Housing Units
8,565
Business & Economy
Business & Economy
Total Businesses
490
Employment
Employment
Employment Rate
62.64%
Education
Education
Bachelor's Degree+
15.99%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (3 Standard, 1 PO Box, 0 Unique) [See All]
Area Codes:208 / 986
Timezone:Mountain (GMT -07:00)
Local Time:2:11:58 PM
Population:22,211 [See All]
FIPS:16067
CBSA:Burley, ID
Land Area:870 sq mi
Water Area:7 sq mi
Coordinates:42.7084, -113.6989
Quick Link:
https://www.zip-codes.com/county/id-minidoka.asp
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Idaho's #18 most populous county
22,211 residents across 4 ZIPs — #18 of 46 Idaho counties.

Standout ZIPs in this County


Most Populous
Rupert · 12,671 people
57.0% of county total
Highest Income
Paul · $79,643 median
1.1× county average
Largest Land Area
Rupert · 454.6 sq mi
Spans the most ground
Fastest Growth
Heyburn · 23.5% (10-yr)
4,921 → 6,075 residents
Most Educated
Heyburn · 20.9% bachelor's+
847 of 4,061 adults 25+

Things worth knowing about Minidoka County


22,211 residents live across 4 ZIPs covering 870 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 20,406 to 22,211 from 2014 to 2024 — a +8.8% change. 2 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 83347 (Paul, $79,643 median) and poorest ZIP 83350 (Rupert, $61,806) are 18.5 miles apart — a 1.3× income gap across local geography.

Median home values vary 1.2× across this county — from $244,100 in 83350 (Rupert) to $298,800 in 83336 (Heyburn).

Density varies 17× across the county — from 9 people/sq mi in 83347 (Paul) to 159 in 83336 (Heyburn).

Educational attainment ranges from 12.5% bachelor's+ in 83350 (Rupert) to 20.9% in 83336 (Heyburn) — the breadth of educational profiles across the area.

Within Idaho, this is the #18 most populous of 46 counties and ranks #20 for median household income with the #30 fastest decade growth .

Weighted by population, the typical household earns about $67,156 across the county — reflecting what a typical resident sees, not a simple ZIP average.

16.0% of adults age 25+ hold a bachelor's degree or higher (2,235 of 13,977 reporting).

3 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Minidoka County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
870
square miles
Avg density
25.5
people per sq mi
Population
22,211
across 4 ZIPs
Rupert
454.6 sq mi
12,671 residents
Paul
377.5 sq mi
3,465 residents
Heyburn
38.2 sq mi
6,075 residents

All ZIP Codes in Minidoka County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
83350RupertStandard12,671$61,806454.65.7%
83336HeyburnStandard6,075$71,19138.223.5%
83347PaulStandard3,465$79,643377.5-0.8%
83343MinidokaPO Box0.0

Adjacent & Nearby Counties