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/WI/COUNTY/BUFFALO

Buffalo County, WI ZIP codes

Buffalo County, WI has 6 ZIP codes, in 6 towns: 54755, 54629, 54622, 54610, 54756 and 54743. 3 more cross into it from neighbouring counties: 54612, 54736 and 54747.

The county seat is Alma.

ZIP codes
6
Partly in it
3 more
Towns
6
County seat
Alma
County FIPS
55011
Population
13,393
Median household income
$70,479
Land area
676 sq mi

Buffalo County ZIP codes by town

Alma (county seat)
54610

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.

ZIP codes partly in Buffalo County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Buffalo County.

Map of Buffalo County ZIP codes

546105462254629547435475554756

The ZIP codes of Buffalo 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.

Buffalo County in numbers

About 13,393 people live in Buffalo County, in 5,720 households, the 67th most populous of Wisconsin's 72 counties. The median household income is $70,479 a year, 9% below the Wisconsin median of $77,485 (US: $80,734). The median owner-occupied home is valued at $213,300 (20% below the Wisconsin median), and median gross rent is $876 a month. The median age is 46.5; 22.1% of adults 25 and over hold a bachelor's degree or higher (33.4% across Wisconsin); the average commute takes 27 minutes.

Population13,393Buffalo13,393
Households5,720Buffalo5,720
Median age46.5Buffalo46.5Wisconsin40.2US 38.9
Median household income$70,479Buffalo$70,479Wisconsin$77,485US $80,734
Median home value$213,300Buffalo$213,300Wisconsin$266,500US $332,700
Median gross rent$876Buffalo$876Wisconsin$1,087US $1,413
Bachelor's degree or higher22.1%Buffalo22.1%Wisconsin33.4%US 35.7%
Mean commute26.5 minBuffalo26.5 minWisconsin22.2 minUS 26.4 min
Population density20 / sq miBuffalo20 / 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 Buffalo County

Largest towns in Buffalo County
TownZIP codesPopulation
Mondovi 1 2,872
Fountain City 1 835
Alma 1 788
Cochrane 1 516
Nelson 1 381
Gilmanton 1 148

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 Buffalo County.

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

Every ZIP code in Buffalo County, with figures

ZIP codes in Buffalo County
ZIP City Type Population Median income Median home
54610 Alma , WI Standard 1,564 $61,563 $207,000
54622 Cochrane , WI Standard 2,147 $78,194 $188,200
54629 Fountain City , WI Standard 2,595 $74,432 $229,900
54743 Gilmanton , WI No street area — — —
54755 Mondovi , WI Standard 7,389 $72,564 $237,400
54756 Nelson , WI Standard 946 $75,625 $215,400

Cite this page

zipcodes.pro. “Buffalo County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/wi/county/buffalo

Underlying data is public domain or openly licensed — sources, vintages and licences.