ZIP Codes of Lake County, MI

Population & People
Population & People
Total Population
11,002
Household Income
Household Income
Median Income
$48,751
Housing
Housing
Total Housing Units
12,315
Business & Economy
Business & Economy
Total Businesses
156
Employment
Employment
Employment Rate
40.01%
Education
Education
Bachelor's Degree+
12.17%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 5 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:5 ZIP Codes (5 Standard, 0 PO Box, 0 Unique) [See All]
Area Code:231
Timezone:Eastern (GMT -05:00)
Local Time:11:53:51 PM
Population:11,002 [See All]
FIPS:26085
Land Area:450 sq mi
Water Area:6 sq mi
Coordinates:43.9682, -85.7944
Quick Link:
https://www.zip-codes.com/county/mi-lake.asp
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Michigan's fastest-growing county
Population up 14.9% over the past decade.

Standout ZIPs in this County


Most Populous
Baldwin · 5,408 people
49.2% of county total
Highest Income
Chase · $60,147 median
1.2× county average
Largest Land Area
Luther · 124.5 sq mi
Spans the most ground
Fastest Growth
Baldwin · 29.3% (10-yr)
4,182 → 5,408 residents
Most Educated
Irons · 15.1% bachelor's+
240 of 1,591 adults 25+

Things worth knowing about Lake County


11,002 residents live across 5 ZIPs covering 450 sq mi, served by 5 distinct USPS-recognized cities.

Population moved from 9,573 to 11,002 from 2014 to 2024 — a +14.9% change. 3 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 49623 (Chase, $60,147 median) and poorest ZIP 49642 (Idlewild, $26,950) are 7.0 miles apart — a 2.2× income gap across local geography.

Median home values vary 1.5× across this county — from $116,000 in 49304 (Baldwin) to $175,400 in 49644 (Irons).

Density varies across the county — from 14 people/sq mi in 49644 (Irons) to 52 in 49642 (Idlewild).

Educational attainment ranges from 11.0% bachelor's+ in 49656 (Luther) to 15.1% in 49644 (Irons) — the breadth of educational profiles across the area.

Within Michigan, this is the #74 most populous of 83 counties and ranks #82 for median household income with the #1 fastest decade growth .

Weighted by population, the typical household earns about $48,655 across the county — reflecting what a typical resident sees, not a simple ZIP average.

12.2% of adults age 25+ hold a bachelor's degree or higher (1,049 of 8,623 reporting).

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

All ZIP Codes in Lake County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
49304BaldwinStandard5,408$45,991120.629.3%
49656LutherStandard1,908$56,656124.522.5%
49644IronsStandard1,715$54,013122.4-10.2%
49623ChaseStandard986$60,14764.1-1.8%
49642IdlewildStandard985$26,95018.87.1%

Adjacent & Nearby Counties