ZIP Codes of Oconto County, WI

Population & People
Population & People
Total Population
35,988
Household Income
Household Income
Median Income
$77,605
Housing
Housing
Total Housing Units
21,018
Business & Economy
Business & Economy
Total Businesses
738
Employment
Employment
Employment Rate
59.39%
Education
Education
Bachelor's Degree+
18.98%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 11 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:11 ZIP Codes (11 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:274 / 534 / 715 / 920
Timezone:Central (GMT -06:00)
Local Time:2:14:20 PM
Population:35,988 [See All]
FIPS:55083
CBSA:Green Bay, WI
Land Area:888 sq mi
Water Area:26 sq mi
Coordinates:44.9789, -88.2405
Quick Link:
https://www.zip-codes.com/county/wi-oconto.asp
Need Oconto data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Wisconsin's #40 most populous county
35,988 residents across 11 ZIPs — #40 of 73 Wisconsin counties.

Standout ZIPs in this County


Most Populous
Oconto · 7,551 people
21.0% of county total
Highest Income
Sobieski · $113,698 median
1.5× county average
Largest Land Area
Suring · 169.2 sq mi
Spans the most ground
Fastest Growth
Sobieski · 15.3% (10-yr)
3,489 → 4,024 residents
Most Educated
Sobieski · 29.1% bachelor's+
777 of 2,672 adults 25+

Things worth knowing about Oconto County


35,988 residents live across 11 ZIPs covering 888 sq mi, served by 11 distinct USPS-recognized cities.

Population moved from 34,425 to 35,988 from 2014 to 2024 — a +4.5% change. 8 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 54171 (Sobieski, $113,698 median) and poorest ZIP 54149 (Mountain, $50,250) are 38.2 miles apart — a 2.3× income gap across local geography.

Median home values vary 2.4× across this county — from $143,400 in 54124 (Gillett) to $349,100 in 54171 (Sobieski).

Density varies 18× across the county — from 9 people/sq mi in 54149 (Mountain) to 162 in 54171 (Sobieski).

Educational attainment ranges from 12.7% bachelor's+ in 54124 (Gillett) to 29.1% in 54171 (Sobieski) — the breadth of educational profiles across the area.

Within Wisconsin, this is the #40 most populous of 73 counties and ranks #30 for median household income .

Weighted by population, the typical household earns about $77,560 across the county — reflecting what a typical resident sees, not a simple ZIP average.

19.0% of adults age 25+ hold a bachelor's degree or higher (5,047 of 26,591 reporting).

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

Stories about Oconto 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
888
square miles
Avg density
40.5
people per sq mi
Population
35,988
across 11 ZIPs
Suring
169.2 sq mi
3,171 residents
Mountain
136.2 sq mi
1,210 residents
Oconto
103.4 sq mi
7,551 residents

All ZIP Codes in Oconto County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
54153OcontoStandard7,551$70,684103.42.8%
54154Oconto FallsStandard5,741$59,76774.04.6%
54171SobieskiStandard4,024$113,69824.915.3%
54124GillettStandard3,414$60,70396.2-5.2%
54174SuringStandard3,171$69,878169.211.5%
54139LenaStandard3,130$78,013101.2-1.1%
54101AbramsStandard2,998$94,50048.97.0%
54141Little SuamicoStandard2,861$101,55325.78.0%
54149MountainStandard1,210$50,250136.2-6.3%
54175TownsendStandard1,101$87,61447.511.9%
54138LakewoodStandard787$67,00060.43.1%

Adjacent & Nearby Counties