Data Last Updated: July 1, 2025

Sauk County, WI ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Sauk, WI.	21 ZIP Codes (12 General, 2 PO Box, 1 Unique, & 6 Multi County) [More Details]
Area Codes: The Telephone Area Codes that are associated with Sauk, 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.	353, 608
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 Sauk, 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.	65,763 [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.	55111
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.	Baraboo, WI
Land Area: The approximate amount of land area covered by Sauk, 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.	832 square miles
Water Area: The approximate amount of water area covered by Sauk, 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.	18 square miles
Coordinates: The latitude/longitude centroid coordinates for Sauk County, WI.	-89.948228, 43.426668
Quick Link: Copy the direct link to the Sauk, WICounty page and use anywhere you like!	https://www.zip-codes.com/county/wi-sauk.asp

Sauk, WI ZIP Code Boundaries

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Sauk County, WI Covers 21 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 53556 *	General	Lone Rock	2,680	--
ZIP Code 53561	General	Merrimac	2,016	3.07%
ZIP Code 53577	General	Plain	1,385	2.11%
ZIP Code 53578	General	Prairie Du Sac	6,556	9.97%
ZIP Code 53583	General	Sauk City	5,787	8.80%
ZIP Code 53588	General	Spring Green	4,139	6.29%
ZIP Code 53901 *	General	Portage	14,924	--
ZIP Code 53913	General	Baraboo	21,046	32.00%
ZIP Code 53924 *	General	Cazenovia	1,333	--
ZIP Code 53937	General	Hillpoint	1,172	1.78%
ZIP Code 53940	P.O. Box	Lake Delton	18	0.03%
ZIP Code 53941	General	La Valle	3,044	4.63%
ZIP Code 53942	P.O. Box	Lime Ridge	121	0.18%
ZIP Code 53943	General	Loganville	1,067	1.62%
ZIP Code 53944 *	General	Lyndon Station	2,370	--
ZIP Code 53951	General	North Freedom	2,291	3.48%
ZIP Code 53958	Unique	Reedsburg	0	0.00%
ZIP Code 53959	General	Reedsburg	14,298	21.74%
ZIP Code 53961	General	Rock Springs	793	1.21%
ZIP Code 53965 *	General	Wisconsin Dells	11,361	--
ZIP Code 53968 *	General	Wonewoc	2,326	--

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

Important Sauk, WI Information

Sauk County, WI Covers 21 ZIP Codes. This includes 12 General ZIP Codes, 2 PO Box ZIP Codes, and 1 Unique (reserved for Business and Volume Mail Receivers). There are also 6 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Sauk County.

The population for Sauk County is 65,763, according to the U.S. Census. Population Density is 79.04 persons per square mile. With 30,784 Housing Units, the Average Household Size is 2.39 persons. There are 27,094 Family Households with an Average Family Size of 2.89 persons. 5.47% of the population is without Health Insurance. The 65.40% Employment Rate is 5.60% above the national average of 59.8%.46,261 people aged 25+ have some educational achievement, with 26.49% (or 12,256 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

There are 2 area codes serving this area including353 and 608. Sauk is also located in the Central timezone and the current local time is shown above.

Sauk is part of the Baraboo, WI Core Based Statistical Area (CBSA). Its CBSA Code is 12660.It is classified as a micro area, which means it has an urban core of at least 10,000 but less then 50,000 people.

CBSAs are defined by the OMB as geographic areas that have at least one core with a population of 10,000 or more 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 Sauk, WI have 27,782 Residential mailboxes and 1,552 Business mailboxes.There are 1,677 businesses with a total of 26,834 employees. That is an average of 16.0 employees per business. Annual payroll for these businesses is $1,357,003,000. Other Demographics

Sauk County Demographic Profile

Population & People

Total Population

65,763

Income

Median Household Income

$77,648

Housing

Total Housing Units

30,784

Health

Without Healthcare Coverage

5.47%

Business & Economy

Total Businesses

1,677

Families

Total Households

27,094

Employment

Employment Rate

65.40%

Education

Bachelor's Degree or Higher

26.49%

Total Population: Total number of people from the 2020 U.S. Census for Sauk, 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.	65,763
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Sauk, 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.	66,439
Total Households: Total number of Households from the 2020 U.S. Census for Sauk, WI. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	27,094
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.	30,784
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.	2.39
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 Sauk Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	27,782
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	1,552
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.	32,495
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	22,145
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	2,425

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	1,677
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$307,561,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$1,357,003,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	26,834

Sum of all ZIP Codes assigned Sauk, 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