ZIP Codes of Lincoln County, WI

Population & People
Population & People
Total Population
32,180
Household Income
Household Income
Median Income
$71,997
Housing
Housing
Total Housing Units
18,811
Business & Economy
Business & Economy
Total Businesses
730
Employment
Employment
Employment Rate
56.70%
Education
Education
Bachelor's Degree+
20.87%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 5 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:5 ZIP Codes (4 Standard, 1 PO Box, 0 Unique) [See All]
Area Code:715
Timezone:Central (GMT -06:00)
Local Time:2:14:19 PM
Population:32,180 [See All]
FIPS:55069
Land Area:1,022 sq mi
Water Area:34 sq mi
Coordinates:45.3737, -89.6505
Quick Link:
https://www.zip-codes.com/county/wi-lincoln.asp
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Wisconsin's #42 most populous county
32,180 residents across 5 ZIPs — #42 of 73 Wisconsin counties.

Standout ZIPs in this County


Most Populous
Merrill · 18,969 people
58.9% of county total
Highest Income
Gleason · $83,125 median
1.2× county average
Largest Land Area
Merrill · 400.0 sq mi
Spans the most ground
Fastest Growth
Irma · 29.8% (10-yr)
1,176 → 1,527 residents
Most Educated
Tomahawk · 23.9% bachelor's+
1,786 of 7,464 adults 25+

Things worth knowing about Lincoln County


32,180 residents live across 5 ZIPs covering 1,022 sq mi, served by 5 distinct USPS-recognized cities.

Population moved from 32,052 to 32,180 from 2014 to 2024 — a +0.4% change. 2 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 54435 (Gleason, $83,125 median) and poorest ZIP 54442 (Irma, $64,779) are 11.8 miles apart — a 1.3× income gap across local geography.

Median home values vary 1.3× across this county — from $173,900 in 54452 (Merrill) to $229,800 in 54442 (Irma).

Density varies across the county — from 9 people/sq mi in 54435 (Gleason) to 47 in 54452 (Merrill).

Educational attainment ranges from 19.3% bachelor's+ in 54452 (Merrill) to 23.9% in 54487 (Tomahawk) — the breadth of educational profiles across the area.

Within Wisconsin, this is the #42 most populous of 73 counties and ranks #44 for median household income .

Weighted by population, the typical household earns about $69,962 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.9% of adults age 25+ hold a bachelor's degree or higher (5,129 of 24,577 reporting).

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

Stories about Lincoln 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
1,022
square miles
Avg density
31.5
people per sq mi
Population
32,180
across 5 ZIPs
Merrill
400.0 sq mi
18,969 residents
Tomahawk
315.5 sq mi
9,562 residents
Gleason
224.8 sq mi
2,122 residents

All ZIP Codes in Lincoln County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
54452MerrillStandard18,969$67,669400.0-1.4%
54487TomahawkStandard9,562$72,416315.51.1%
54435GleasonStandard2,122$83,125224.8-2.3%
54442IrmaStandard1,527$64,77981.829.8%
54532Heafford JunctionPO Box0.0

Adjacent & Nearby Counties