ZIP Codes of Buffalo County, WI

Population & People
Population & People
Total Population
14,641
Household Income
Household Income
Median Income
$72,476
Housing
Housing
Total Housing Units
6,977
Business & Economy
Business & Economy
Total Businesses
327
Employment
Employment
Employment Rate
61.94%
Education
Education
Bachelor's Degree+
22.06%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 6 ZIPs in this county.
Data Last Updated: June 1, 2026
ZIP Codes:6 ZIP Codes (5 Standard, 1 PO Box, 0 Unique) [See All]
Area Codes:353 / 608 / 715
Timezone:Central (GMT -06:00)
Local Time:2:14:17 PM
Population:14,641 [See All]
FIPS:55011
Land Area:661 sq mi
Water Area:33 sq mi
Coordinates:44.3834, -91.7589
Quick Link:
https://www.zip-codes.com/county/wi-buffalo.asp
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Wisconsin's #63 most populous county
14,641 residents across 6 ZIPs — #63 of 73 Wisconsin counties.

Standout ZIPs in this County


Most Populous
Mondovi · 7,389 people
50.5% of county total
Highest Income
Cochrane · $78,194 median
1.1× county average
Largest Land Area
Mondovi · 265.1 sq mi
Spans the most ground
Fastest Growth
Alma · 1.7% (10-yr)
1,538 → 1,564 residents
Most Educated
Alma · 27.3% bachelor's+
336 of 1,231 adults 25+

Things worth knowing about Buffalo County


14,641 residents live across 6 ZIPs covering 661 sq mi, served by 6 distinct USPS-recognized cities.

Population moved from 14,587 to 14,641 from 2014 to 2024 — a +0.4% change. 3 ZIPs gained residents, 2 lost.

The county's wealthiest ZIP 54622 (Cochrane, $78,194 median) and poorest ZIP 54610 (Alma, $61,563) are 8.0 miles apart — a 1.3× income gap across local geography.

Median home values vary 1.3× across this county — from $188,200 in 54622 (Cochrane) to $237,400 in 54755 (Mondovi).

Density varies across the county — from 11 people/sq mi in 54610 (Alma) to 38 in 54622 (Cochrane).

Educational attainment ranges from 19.5% bachelor's+ in 54755 (Mondovi) to 27.3% in 54610 (Alma) — the breadth of educational profiles across the area.

Within Wisconsin, this is the #63 most populous of 73 counties and ranks #43 for median household income .

Weighted by population, the typical household earns about $72,743 across the county — reflecting what a typical resident sees, not a simple ZIP average.

22.1% of adults age 25+ hold a bachelor's degree or higher (2,341 of 10,613 reporting).

5 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Buffalo 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
661
square miles
Avg density
22.1
people per sq mi
Population
14,641
across 6 ZIPs
Mondovi
265.1 sq mi
7,389 residents
Alma
138.6 sq mi
1,564 residents
Fountain City
124.7 sq mi
2,595 residents

All ZIP Codes in Buffalo County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
54755MondoviStandard7,389$72,564265.1-0.8%
54629Fountain CityStandard2,595$74,432124.70.3%
54622CochraneStandard2,147$78,19456.3-0.9%
54610AlmaStandard1,564$61,563138.61.7%
54756NelsonStandard946$75,62576.812.0%
54743GilmantonPO Box0.0

Adjacent & Nearby Counties