Data Last Updated: July 1, 2025

Fond Du Lac County, WI ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Fond Du Lac, WI.	26 ZIP Codes (13 General, 2 PO Box, 0 Unique, & 11 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Fond Du Lac, WI. Area Codes are used in the North American Numbering Plan (NANP) to facilitate phone routing. There are approximately 350 area codes in use in the United States.	274, 920
Timezone: Time zone designation within the U.S. Please note that not all areas in the U.S. observe daylight saving time which can affect actual local time for this city. There are 7 standard time zones which are, from west to east: Hawaii-Aleutian, Alaska, Pacific, Mountain, Central, Eastern, Atlantic. Also included in U.S. Territories are Samoa, Guam and Palau.	Central
Local Time: The current local time for each timezone. If more than 1 time zone for this area, all local times will be shown. Counties can cross timezones, so more than 1 may be shown.	12:00:00 AM
Population: The population of Fond Du Lac, WI from the U.S. Census 2020. Included are U.S. Citizens, permanent residents, temporary migrants, and undocumented individuals. The total population represents people who live in the city, not just those present while the Census was being completed.	104,154 [More Details]
FIPS: FIPS stands for Federal Information Processing Standards, which are a set of publicly announced standards for computer systems. A county FIPS code is a unique numeric identifier for a county in the United States, assigned by the National Institute of Standards and Technology (NIST). County FIPS codes have five digits, with the first two digits identifying the state and the last 3 indicating the county.	55039
CBSA: A Core Based Statistical Area (CBSA) is the recognized term for a region that functions around an urban core with a population of at least 10,000 people, according to the standards set by the Office of Management and Budget (OMB) in 2000. A CBSA is divided into two subsets: Metro and Micro, and these classifications are determined by population density. A Micro area is identified by a population ranging between 10,000 to 50,000, while a Metro area is defined as having a population that exceeds 50,000.	Fond du Lac, WI
Land Area: The approximate amount of land area covered by Fond Du Lac, WI in square miles. The Land Area provided by the Census Bureau is based on geographic boundaries that include the mainland, islands, inland, coastal, Great Lakes, and territorial waters associated with each city.	720 square miles
Water Area: The approximate amount of water area covered by Fond Du Lac, WI in square miles. Calculations by the Census Bureau for Water Area take into account inland bodies of water, coastal regions, Great Lakes, and territorial sea waters. This encompasses features such as lakes, reservoirs, rivers, and coastal water bodies.	46 square miles
Coordinates: The latitude/longitude centroid coordinates for Fond Du Lac County, WI.	-88.488258, 43.753582
Quick Link: Copy the direct link to the Fond Du Lac, WICounty page and use anywhere you like!	https://www.zip-codes.com/county/wi-fond-du-lac.asp

Fond Du Lac, WI ZIP Code Boundaries

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Fond Du Lac County, WI Covers 26 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 53006 *	General	Brownsville	1,767	--
ZIP Code 53010	General	Campbellsport	7,497	7.20%
ZIP Code 53011 *	General	Cascade	2,259	--
ZIP Code 53014 *	General	Chilton	8,073	--
ZIP Code 53019	General	Eden	1,942	1.86%
ZIP Code 53023 *	General	Glenbeulah	1,409	--
ZIP Code 53040 *	General	Kewaskum	8,358	--
ZIP Code 53048 *	General	Lomira	3,542	--
ZIP Code 53049	General	Malone	2,536	2.43%
ZIP Code 53057	General	Mount Calvary	1,552	1.49%
ZIP Code 53061 *	General	New Holstein	5,055	--
ZIP Code 53065	General	Oakfield	2,128	2.04%
ZIP Code 53079	General	Saint Cloud	1,534	1.47%
ZIP Code 53919	General	Brandon	2,334	2.24%
ZIP Code 53931	P.O. Box	Fairwater	346	0.33%
ZIP Code 53946 *	General	Markesan	4,239	--
ZIP Code 53963 *	General	Waupun	14,078	--
ZIP Code 54904 *	General	Oshkosh	21,828	--
ZIP Code 54932	General	Eldorado	1,152	1.11%
ZIP Code 54935	General	Fond Du Lac	42,513	40.82%
ZIP Code 54936	P.O. Box	Fond Du Lac	0	0.00%
ZIP Code 54937	General	Fond Du Lac	21,333	20.48%
ZIP Code 54964 *	General	Pickett	1,068	--
ZIP Code 54971	General	Ripon	10,938	10.50%
ZIP Code 54974	General	Rosendale	1,620	1.56%
ZIP Code 54979	General	Van Dyne	1,453	1.40%

* Indicates a Multi County ZIP Code. These ZIP Codes partially cross over into Fond Du Lac, WI, but will mostly cover area in a different County. Not included in % of Population calculations.

Important Fond Du Lac, WI Information

Fond Du Lac County, WI Covers 26 ZIP Codes. This includes 13 General ZIP Codes, 2 PO Box ZIP Codes, and 0 Unique (reserved for Business and Volume Mail Receivers). There are also 11 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Fond Du Lac County.

The population for Fond Du Lac County is 104,154, according to the U.S. Census. Population Density is 144.66 persons per square mile. With 45,740 Housing Units, the Average Household Size is 2.35 persons. There are 42,824 Family Households with an Average Family Size of 2.89 persons. 3.27% of the population is without Health Insurance. The 63.01% Employment Rate is 3.21% above the national average of 59.8%.72,965 people aged 25+ have some educational achievement, with 22.61% (or 16,498 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 2 area codes serving this area including274 and 920. Fond Du Lac is also located in the Central timezone and the current local time is shown above.

Fond Du Lac is part of the Fond du Lac, WI Core Based Statistical Area (CBSA). Its CBSA Code is 22540.It is classified as a metro area, which means the combined population is 50,000 or more (at its core).

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more (for a micro area) and adjacent territory with a high degree of social and economic integration. CBSA codes are commonly used to accurately file Medicare claims and to verify applicable incentives using a patient's ZIP Code.

ZIP Codes in Fond Du Lac, WI have 41,637 Residential mailboxes and 2,024 Business mailboxes.There are 2,089 businesses with a total of 40,169 employees. That is an average of 19.2 employees per business. Annual payroll for these businesses is $2,178,258,000. Other Demographics

Fond Du Lac County Demographic Profile

Population & People

Total Population

104,154

Income

Median Household Income

$73,154

Housing

Total Housing Units

45,740

Health

Without Healthcare Coverage

3.27%

Business & Economy

Total Businesses

2,089

Families

Total Households

42,824

Employment

Employment Rate

63.01%

Education

Bachelor's Degree or Higher

22.61%

Total Population: Total number of people from the 2020 U.S. Census for Fond Du Lac, WI. This reflects the exact count of this area at that point in time, not future estimates, regardless of citizenship or immigration status. It is intended to count all persons living within the geographic area, not just those present on the day of the census.	104,154
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Fond Du Lac, WI. This is derived from known delivery information, household occupancy rates, household size, and more to come up with an accurate estimation for the current population. IMPORTANT: This does not include population totals for persons in nursing homes, correctional facilities, or other institutions. This is an estimation of the household population based on US Postal Service delivery information.	97,463
Total Households: Total number of Households from the 2020 U.S. Census for Fond Du Lac, WI. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	42,824
Total Housing Units: The total number of Housing Units is the number of occupied units + the number of vacant units. Ownership is defined by whether the unit is occupied by an owner or by a tenant. Owner occupancy means that the owner lives in the unit. This value comes from the 2020 U.S. Census and is not a projection or estimate.	45,740
Average Household Size: The Average Household Size, is obtained by dividing the number of people in Households (excluding those in group quarters, nursing home, prisons, and dorm rooms) by the number of Households. A Household includes everyone living in a residential unit. Those who do not live in a household are classified as living in group accommodation. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.35
Average Family Size: Average Family Size is calculated by dividing the number of people in a Family Household by the number of Family Households. The U.S. Census Bureau defines family households as households consisting of two or more individuals who are related by birth, marriage, or adoption. They also may include other unrelated people. Non-family households consist of people who live alone or who share their residence with unrelated individuals. The Average Family Size only looks at the households classified as Family Households. This value is an estimate from the U.S. Census ACS (American Community Survey) and is updated yearly.	2.89

Other Fond Du Lac Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	41,637
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	2,024
Total Delivery Receptacles: The total number of delivery receptacles. This includes curb side mailboxes, centralized units, PO Boxes, NDCBU, and contract boxes. This count is for Residential and Business combined.	49,362
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	32,861
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	5,031

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	2,089
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$533,138,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$2,178,258,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	40,169

Sum of all ZIP Codes assigned Fond Du Lac, WI as their primary County.

References

U.S. Postal Service [Last Updated: 7/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 7/1/2025], https://www.zip-codes.com
U.S. Geological Survey [Updated as needed], https://www.usgs.gov
U.S. Census [Updated Yearly], https://www.census.gov
U.S. Census 2020 [Decennial] [Last Updated: 5/25/2023], https://www.census.gov