ZIP Codes of Osceola County, MI

Population & People
Population & People
Total Population
26,676
Household Income
Household Income
Median Income
$59,499
Housing
Housing
Total Housing Units
14,917
Business & Economy
Business & Economy
Total Businesses
480
Employment
Employment
Employment Rate
50.00%
Education
Education
Bachelor's Degree+
16.15%
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:231 / 989
Timezone:Eastern (GMT -05:00)
Local Time:2:12:34 PM
Population:26,676 [See All]
FIPS:26133
Land Area:743 sq mi
Water Area:9 sq mi
Coordinates:43.9660, -85.3436
Quick Link:
https://www.zip-codes.com/county/mi-osceola.asp
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Owner-dominated county
Just 14.9% of homes are rentals — strong homeownership culture.

Standout ZIPs in this County


Most Populous
Reed City · 7,028 people
26.3% of county total
Highest Income
Leroy · $65,556 median
1.1× county average
Largest Land Area
Marion · 164.0 sq mi
Spans the most ground
Fastest Growth
Leroy · 11.3% (10-yr)
3,039 → 3,383 residents
Most Educated
Tustin · 19.7% bachelor's+
330 of 1,679 adults 25+

Things worth knowing about Osceola County


26,676 residents live across 7 ZIPs covering 743 sq mi, served by 7 distinct USPS-recognized cities.

Population moved from 26,889 to 26,676 from 2014 to 2024 — a -0.8% change. 3 ZIPs gained residents, 4 lost.

The county's wealthiest ZIP 49655 (Leroy, $65,556 median) and poorest ZIP 49631 (Evart, $47,174) are 11.8 miles apart — a 1.4× income gap across local geography.

Median home values vary 1.4× across this county — from $132,300 in 49631 (Evart) to $188,500 in 49688 (Tustin).

Density varies across the county — from 23 people/sq mi in 49679 (Sears) to 54 in 49677 (Reed City).

Educational attainment ranges from 12.7% bachelor's+ in 49665 (Marion) to 19.7% in 49688 (Tustin) — the breadth of educational profiles across the area.

Within Michigan, this is the #55 most populous of 83 counties and ranks #63 for median household income .

Weighted by population, the typical household earns about $57,749 across the county — reflecting what a typical resident sees, not a simple ZIP average.

16.1% of adults age 25+ hold a bachelor's degree or higher (3,087 of 19,115 reporting).

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

Stories about Osceola 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
743
square miles
Avg density
35.9
people per sq mi
Population
26,676
across 7 ZIPs
Marion
164.0 sq mi
3,983 residents
Evart
145.0 sq mi
5,765 residents
Reed City
129.5 sq mi
7,028 residents

All ZIP Codes in Osceola County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
49677Reed CityStandard7,028$59,112129.5-3.0%
49631EvartStandard5,765$47,174145.00.7%
49665MarionStandard3,983$54,265164.0-8.2%
49655LeroyStandard3,383$65,55689.311.3%
49639HerseyStandard2,634$64,38862.72.7%
49688TustinStandard2,508$63,87592.8-2.1%
49679SearsStandard1,375$62,12059.7-2.8%

Adjacent & Nearby Counties