ZIP Codes of Clark County, ID

Population & People
Population & People
Total Population
753
Household Income
Household Income
Median Income
$64,080
Housing
Housing
Total Housing Units
436
Business & Economy
Business & Economy
Total Businesses
11
Employment
Employment
Employment Rate
60.55%
Education
Education
Bachelor's Degree+
22.39%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 2 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:2 ZIP Codes (2 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:208 / 986
Timezone:Mountain (GMT -07:00)
Local Time:2:11:57 PM
Population:753 [See All]
FIPS:16033
Land Area:934 sq mi
Water Area:0 sq mi
Coordinates:44.3381, -112.3471
Quick Link:
https://www.zip-codes.com/county/id-clark.asp
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Idaho's most foreign-born county
21.6% of residents are foreign-born.

Standout ZIPs in this County


Most Populous
Dubois · 729 people
96.8% of county total
Highest Income
Dubois · $53,472 median
0.8× county average
Largest Land Area
Dubois · 812.3 sq mi
Spans the most ground
Fastest Growth
— growth not calculable
Most Educated
— no education data

Things worth knowing about Clark County


753 residents live across 2 ZIPs covering 934 sq mi, served by 2 distinct USPS-recognized cities.

Population moved from 794 to 753 from 2014 to 2024 — a -5.2% change. 0 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 83423 (Dubois, $53,472 median) and poorest ZIP 83423 (Dubois, $53,472) are 0.0 miles apart — a 1.0× income gap across local geography.

Within Idaho, this is the #46 most populous of 46 counties and ranks #34 for median household income .

Weighted by population, the typical household earns about $54,148 across the county — reflecting what a typical resident sees, not a simple ZIP average.

22.4% of adults age 25+ hold a bachelor's degree or higher (103 of 460 reporting).

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

Stories about Clark 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
934
square miles
Avg density
0.8
people per sq mi
Population
753
across 2 ZIPs
Dubois
812.3 sq mi
729 residents
Spencer
121.6 sq mi
24 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Dubois

Population decline

Clark County lost 5.2% of residents between 2014 and 2024.

All ZIP Codes in Clark County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
83423DuboisStandard729$53,472812.3-4.3%
83446SpencerStandard24$74,688121.6-25.0%

Adjacent & Nearby Counties