ZIP Codes of Clark County, WI

Population & People
Population & People
Total Population
36,415
Household Income
Household Income
Median Income
$68,207
Housing
Housing
Total Housing Units
15,337
Business & Economy
Business & Economy
Total Businesses
806
Employment
Employment
Employment Rate
61.77%
Education
Education
Bachelor's Degree+
12.97%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 14 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:14 ZIP Codes (14 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:534 / 715
Timezone:Central (GMT -06:00)
Local Time:2:14:18 PM
Population:36,415 [See All]
FIPS:55019
Land Area:1,279 sq mi
Water Area:8 sq mi
Coordinates:44.8040, -90.5308
Quick Link:
https://www.zip-codes.com/county/wi-clark.asp
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Wisconsin's #39 most populous county
36,415 residents across 14 ZIPs — #39 of 73 Wisconsin counties.

Standout ZIPs in this County


Most Populous
Neillsville · 5,890 people
16.2% of county total
Highest Income
Chili · $79,899 median
1.2× county average
Largest Land Area
Neillsville · 230.4 sq mi
Spans the most ground
Fastest Growth
Curtiss · 16.0% (10-yr)
1,339 → 1,553 residents
Most Educated
Neillsville · 15.8% bachelor's+
646 of 4,098 adults 25+

Things worth knowing about Clark County


36,415 residents live across 14 ZIPs covering 1,279 sq mi, served by 14 distinct USPS-recognized cities.

Population moved from 36,279 to 36,415 from 2014 to 2024 — a +0.4% change. 6 ZIPs gained residents, 8 lost.

The county's wealthiest ZIP 54420 (Chili, $79,899 median) and poorest ZIP 54421 (Colby, $60,820) are 20.4 miles apart — a 1.3× income gap across local geography.

Median home values vary 1.5× across this county — from $147,100 in 54746 (Humbird) to $214,400 in 54493 (Willard).

Density varies 14× across the county — from 6 people/sq mi in 54493 (Willard) to 87 in 54405 (Abbotsford).

Educational attainment ranges from 5.5% bachelor's+ in 54746 (Humbird) to 22.9% in 54420 (Chili) — the breadth of educational profiles across the area.

Within Wisconsin, this is the #39 most populous of 73 counties and ranks #52 for median household income .

Weighted by population, the typical household earns about $67,720 across the county — reflecting what a typical resident sees, not a simple ZIP average.

13.0% of adults age 25+ hold a bachelor's degree or higher (2,938 of 22,654 reporting).

14 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
1,279
square miles
Avg density
28.5
people per sq mi
Population
36,415
across 14 ZIPs
Neillsville
230.4 sq mi
5,890 residents
Thorp
163.2 sq mi
4,171 residents
Greenwood
129.2 sq mi
3,236 residents

All ZIP Codes in Clark County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
54456NeillsvilleStandard5,890$66,934230.4-2.3%
54771ThorpStandard4,171$65,625163.2-2.4%
54446LoyalStandard3,500$74,34276.712.5%
54421ColbyStandard3,468$60,82069.57.1%
54437GreenwoodStandard3,236$67,097129.24.3%
54405AbbotsfordStandard2,770$69,65931.8-4.0%
54460OwenStandard2,620$65,58392.50.6%
54498WitheeStandard2,362$75,833107.9-2.6%
54436GrantonStandard2,203$61,048102.6-8.5%
54425DorchesterStandard1,988$63,42446.0-7.0%
54422CurtissStandard1,553$71,66739.816.0%
54420ChiliStandard1,330$79,89940.5-6.0%
54746HumbirdStandard693$62,41145.0-3.1%
54493WillardStandard631$70,556104.25.2%

Adjacent & Nearby Counties