ZIP Codes of Mille Lacs County, MN

Population & People
Population & People
Total Population
37,003
Household Income
Household Income
Median Income
$68,784
Housing
Housing
Total Housing Units
17,176
Business & Economy
Business & Economy
Total Businesses
976
Employment
Employment
Employment Rate
63.95%
Education
Education
Bachelor's Degree+
18.58%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 8 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:8 ZIP Codes (6 Standard, 2 PO Box, 0 Unique) [See All]
Area Codes:320 / 763
Timezone:Central (GMT -06:00)
Local Time:2:12:38 PM
Population:37,003 [See All]
FIPS:27095
CBSA:Minneapolis-St. Paul-Bloomington, MN-WI
Land Area:960 sq mi
Water Area:121 sq mi
Coordinates:45.8710, -93.6040
Quick Link:
https://www.zip-codes.com/county/mn-mille-lacs.asp
Need Mille Lacs data in your app? Look up ZIP, county, and city data with a single API call.
Try Free
Minnesota's #30 most populous county
37,003 residents across 8 ZIPs — #30 of 93 Minnesota counties.

Standout ZIPs in this County


Most Populous
Princeton · 18,103 people
48.9% of county total
Highest Income
Princeton · $93,824 median
1.4× county average
Largest Land Area
Isle · 268.5 sq mi
Spans the most ground
Fastest Growth
Foreston · 16.0% (10-yr)
1,808 → 2,097 residents
Most Educated
Foreston · 19.8% bachelor's+
271 of 1,366 adults 25+

Things worth knowing about Mille Lacs County


37,003 residents live across 8 ZIPs covering 960 sq mi, served by 8 distinct USPS-recognized cities.

Population moved from 34,552 to 37,003 from 2014 to 2024 — a +7.1% change. 5 ZIPs gained residents, 3 lost.

The county's wealthiest ZIP 55371 (Princeton, $93,824 median) and poorest ZIP 56386 (Wahkon, $54,583) are 36.2 miles apart — a 1.7× income gap across local geography.

Median home values vary 1.9× across this county — from $175,800 in 56363 (Pease) to $327,200 in 55371 (Princeton).

Density varies 92× across the county — from 10 people/sq mi in 56342 (Isle) to 958 in 56363 (Pease).

Educational attainment ranges from 14.6% bachelor's+ in 56386 (Wahkon) to 19.8% in 56330 (Foreston) — the breadth of educational profiles across the area.

Within Minnesota, this is the #30 most populous of 93 counties and ranks #75 for median household income with the #20 fastest decade growth .

Weighted by population, the typical household earns about $82,910 across the county — reflecting what a typical resident sees, not a simple ZIP average.

18.6% of adults age 25+ hold a bachelor's degree or higher (4,784 of 25,745 reporting).

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

Stories about Mille Lacs 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
960
square miles
Avg density
38.6
people per sq mi
Population
37,003
across 8 ZIPs
Isle
268.5 sq mi
2,788 residents
Onamia
233.9 sq mi
3,521 residents
Princeton
201.0 sq mi
18,103 residents

All ZIP Codes in Mille Lacs County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
55371PrincetonStandard18,103$93,824201.010.3%
56353MilacaStandard9,546$78,763192.48.0%
56359OnamiaStandard3,521$59,457233.9-8.9%
56342IsleStandard2,788$63,295268.53.8%
56330ForestonStandard2,097$84,51938.816.0%
56386WahkonStandard661$54,58324.8-5.8%
56363PeasePO Box238$67,5000.257.6%
56313BockPO Box49$48,3330.2-47.9%

Adjacent & Nearby Counties