ZIP Codes of Washburn County, WI

Population & People
Population & People
Total Population
18,456
Household Income
Household Income
Median Income
$65,563
Housing
Housing
Total Housing Units
15,306
Business & Economy
Business & Economy
Total Businesses
525
Employment
Employment
Employment Rate
50.65%
Education
Education
Bachelor's Degree+
26.93%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 7 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:534 / 715
Timezone:Central (GMT -06:00)
Local Time:2:14:21 PM
Population:18,456 [See All]
FIPS:55129
Land Area:1,002 sq mi
Water Area:66 sq mi
Coordinates:45.8652, -91.8129
Quick Link:
https://www.zip-codes.com/county/wi-washburn.asp
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Wisconsin's #55 most populous county
18,456 residents across 7 ZIPs — #55 of 73 Wisconsin counties.

Standout ZIPs in this County


Most Populous
Spooner · 6,266 people
34.0% of county total
Highest Income
Birchwood · $83,036 median
1.3× county average
Largest Land Area
Spooner · 203.7 sq mi
Spans the most ground
Fastest Growth
Minong · 46.6% (10-yr)
1,529 → 2,242 residents
Most Educated
Shell Lake · 29.6% bachelor's+
697 of 2,354 adults 25+

Things worth knowing about Washburn County


18,456 residents live across 7 ZIPs covering 1,002 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 17,377 to 18,456 from 2014 to 2024 — a +6.2% change. 6 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 54817 (Birchwood, $83,036 median) and poorest ZIP 54859 (Minong, $55,882) are 35.3 miles apart — a 1.5× income gap across local geography.

Median home values vary 1.7× across this county — from $172,500 in 54875 (Springbrook) to $296,100 in 54870 (Sarona).

Density varies across the county — from 12 people/sq mi in 54817 (Birchwood) to 31 in 54801 (Spooner).

Educational attainment ranges from 23.4% bachelor's+ in 54888 (Trego) to 29.6% in 54871 (Shell Lake) — the breadth of educational profiles across the area.

Within Wisconsin, this is the #55 most populous of 73 counties and ranks #59 for median household income with the #14 fastest decade growth .

Weighted by population, the typical household earns about $65,604 across the county — reflecting what a typical resident sees, not a simple ZIP average.

26.9% of adults age 25+ hold a bachelor's degree or higher (3,830 of 14,221 reporting).

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

Stories about Washburn 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
1,002
square miles
Avg density
18.4
people per sq mi
Population
18,456
across 7 ZIPs
Spooner
203.7 sq mi
6,266 residents
Birchwood
188.8 sq mi
2,264 residents
Minong
175.3 sq mi
2,242 residents

All ZIP Codes in Washburn County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
54801SpoonerStandard6,266$62,625203.7-5.7%
54871Shell LakeStandard3,270$69,342123.12.2%
54817BirchwoodStandard2,264$83,036188.86.6%
54859MinongStandard2,242$55,882175.346.6%
54870SaronaStandard1,698$67,06394.89.4%
54888TregoStandard1,381$63,971110.69.1%
54875SpringbrookStandard1,335$57,022105.225.4%

Adjacent & Nearby Counties