ZIP Codes of Kalkaska County, MI

Population & People
Population & People
Total Population
18,088
Household Income
Household Income
Median Income
$72,885
Housing
Housing
Total Housing Units
11,855
Business & Economy
Business & Economy
Total Businesses
383
Employment
Employment
Employment Rate
51.90%
Education
Education
Bachelor's Degree+
20.74%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 4 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:4 ZIP Codes (4 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:231 / 989
Timezone:Eastern (GMT -05:00)
Local Time:2:12:32 PM
Population:18,088 [See All]
FIPS:26079
CBSA:Traverse City, MI
Land Area:530 sq mi
Water Area:23 sq mi
Coordinates:44.6897, -85.2100
Quick Link:
https://www.zip-codes.com/county/mi-kalkaska.asp
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Owner-dominated county
Just 12.2% of homes are rentals — strong homeownership culture.

Standout ZIPs in this County


Most Populous
Kalkaska · 8,852 people
48.9% of county total
Highest Income
South Boardman · $77,216 median
1.1× county average
Largest Land Area
Kalkaska · 217.0 sq mi
Spans the most ground
Fastest Growth
South Boardman · 10.7% (10-yr)
1,993 → 2,206 residents
Most Educated
Rapid City · 33.0% bachelor's+
881 of 2,671 adults 25+

Things worth knowing about Kalkaska County


18,088 residents live across 4 ZIPs covering 530 sq mi, served by 4 distinct USPS-recognized cities.

Population moved from 17,088 to 18,088 from 2014 to 2024 — a +5.9% change. 3 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 49680 (South Boardman, $77,216 median) and poorest ZIP 49646 (Kalkaska, $64,863) are 9.5 miles apart — a 1.2× income gap across local geography.

Median home values vary 1.6× across this county — from $168,000 in 49680 (South Boardman) to $269,300 in 49676 (Rapid City).

Density varies across the county — from 17 people/sq mi in 49633 (Fife Lake) to 67 in 49676 (Rapid City).

Educational attainment ranges from 15.7% bachelor's+ in 49646 (Kalkaska) to 33.0% in 49676 (Rapid City) — the breadth of educational profiles across the area.

Within Michigan, this is the #64 most populous of 83 counties and ranks #27 for median household income with the #11 fastest decade growth .

Weighted by population, the typical household earns about $70,217 across the county — reflecting what a typical resident sees, not a simple ZIP average.

20.7% of adults age 25+ hold a bachelor's degree or higher (2,804 of 13,520 reporting).

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

Stories about Kalkaska 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
530
square miles
Avg density
34.1
people per sq mi
Population
18,088
across 4 ZIPs
Kalkaska
217.0 sq mi
8,852 residents
Fife Lake
204.8 sq mi
3,410 residents
Rapid City
54.4 sq mi
3,620 residents

All ZIP Codes in Kalkaska County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
49646KalkaskaStandard8,852$64,863217.08.0%
49676Rapid CityStandard3,620$75,78154.48.5%
49633Fife LakeStandard3,410$73,681204.8-4.4%
49680South BoardmanStandard2,206$77,21654.010.7%

Adjacent & Nearby Counties