Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/MI/COUNTY/GRATIOT

Gratiot County, MI ZIP codes

There are 15 ZIP codes in Gratiot County, MI, in 15 towns, from 48615 to 48889. The largest are 48801 (Alma), 48880 (Saint Louis) and 48847 (Ithaca).

The county seat is Ithaca.

ZIP codes
15
Towns
15
County seat
Ithaca
County FIPS
26057
Population
41,385
Median household income
$63,556
Land area
568 sq mi
Area code
989
Metro area
Alma

Gratiot County ZIP codes by town

Ithaca (county seat)
48847

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Gratiot County ZIP codes

486154866248801488064880748830488324884748856488624887148874488774888048889

The ZIP codes of Gratiot County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Gratiot County in numbers

About 41,385 people live in Gratiot County, in 14,775 households, the 39th most populous of Michigan's 83 counties. The median household income is $63,556 a year, 13% below the Michigan median of $72,875 (US: $80,734). The median owner-occupied home is valued at $147,500 (36% below the Michigan median), and median gross rent is $834 a month. The median age is 39.6; 18.7% of adults 25 and over hold a bachelor's degree or higher (32.4% across Michigan); the average commute takes 24 minutes.

Population41,385Gratiot41,385
Households14,775Gratiot14,775
Median age39.6Gratiot39.6Michigan40.2US 38.9
Median household income$63,556Gratiot$63,556Michigan$72,875US $80,734
Median home value$147,500Gratiot$147,500Michigan$231,600US $332,700
Median gross rent$834Gratiot$834Michigan$1,129US $1,413
Bachelor's degree or higher18.7%Gratiot18.7%Michigan32.4%US 35.7%
Mean commute23.9 minGratiot23.9 minMichigan24.2 minUS 26.4 min
Population density73 / sq miGratiot73 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Gratiot County

Largest towns in Gratiot County
TownZIP codesPopulation
Alma 1 9,396
St. Louis 1 7,367
Ithaca 1 2,817
Sumner 1 1,528
Breckenridge 1 1,517
Elwell 1 1,307
Wheeler 1 1,185
Middleton 1 966
Bannister 1 658
Perrinton 1 513
Ashley 1 483
Elm Hall 1 228
Riverdale 1 216
Pompeii 1 107
North Star 1 59

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Gratiot County.

Not sure you are in Gratiot County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Gratiot County, with figures

ZIP codes in Gratiot County
ZIP City Type Population Median income Median home
48615 Breckenridge , MI Standard 3,061 $70,000 $143,400
48662 Wheeler , MI Standard 1,185 $70,321 $131,100
48801 Alma , MI Standard 13,278 $58,750 $129,700
48806 Ashley , MI Standard 1,752 $61,375 $155,600
48807 Bannister , MI Standard 658 $60,825 $108,200
48830 Elm Hall , MI No street area — — —
48832 Elwell , MI Standard 1,307 $73,393 $163,700
48847 Ithaca , MI Standard 5,663 $66,264 $172,500
48856 Middleton , MI Standard 966 $91,413 $183,300
48862 North Star , MI Standard 59 $51,563 $75,800
48871 Perrinton , MI Standard 2,103 $84,803 $230,600
48874 Pompeii , MI Standard 107 $75,774 $111,300
48877 Riverdale , MI Standard 1,962 $64,653 $112,300
48880 Saint Louis , MI Standard 9,994 $59,922 $144,900
48889 Sumner , MI Standard 1,528 $60,200 $157,900

Cite this page

zipcodes.pro. “Gratiot County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/mi/county/gratiot

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