Data Last Updated: May 1, 2025

Lake County, SD ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Lake, SD.	14 ZIP Codes (7 General, 0 PO Box, 0 Unique, & 7 Multi County) [More Details]
Area Code: The Telephone Area Code that are associated with Lake, SD. 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.	605
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 Lake, SD 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.	11,059 [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.	46079
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.	None
Land Area: The approximate amount of land area covered by Lake, SD 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.	563 square miles
Water Area: The approximate amount of water area covered by Lake, SD 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.	12 square miles
Coordinates: The latitude/longitude centroid coordinates for Lake County, SD.	-97.129359, 44.022058
Quick Link: Copy the direct link to the Lake, SDCounty page and use anywhere you like!	https://www.zip-codes.com/county/sd-lake.asp

Lake, SD ZIP Code Boundaries

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Lake County, SD Covers 14 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 57016	General	Chester	689	6.23%
ZIP Code 57017 *	General	Colman	1,294	--
ZIP Code 57018 *	General	Colton	1,482	--
ZIP Code 57042	General	Madison	8,131	73.52%
ZIP Code 57048 *	General	Montrose	1,025	--
ZIP Code 57050	General	Nunda	206	1.86%
ZIP Code 57051 *	General	Oldham	248	--
ZIP Code 57054	General	Ramona	430	3.89%
ZIP Code 57057	General	Rutland	182	1.65%
ZIP Code 57058 *	General	Salem	2,011	--
ZIP Code 57071 *	General	Volga	3,134	--
ZIP Code 57075	General	Wentworth	1,168	10.56%
ZIP Code 57076	General	Winfred	317	2.87%
ZIP Code 57212 *	General	Arlington	1,999	--

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

Important Lake, SD Information

Lake County, SD Covers 14 ZIP Codes. This includes 7 General ZIP Codes, 0 PO Box ZIP Codes, and 0 Unique (reserved for Business and Volume Mail Receivers). There are also 7 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Lake County.

The population for Lake County is 11,059, according to the U.S. Census. Population Density is 19.64 persons per square mile. With 5,658 Housing Units, the Average Household Size is 2.29 persons. There are 4,576 Family Households with an Average Family Size of 2.84 persons. 3.11% of the population is without Health Insurance. The 65.46% Employment Rate is 5.66% above the national average of 59.8%.7,701 people aged 25+ have some educational achievement, with 34.67% (or 2,670 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

605 is the only area code for this area. Lake is also located in the Central timezone and the current local time is shown above.

ZIP Codes in Lake, SD have 4,867 Residential mailboxes and 254 Business mailboxes.There are 331 businesses with a total of 3,784 employees. That is an average of 11.4 employees per business. Annual payroll for these businesses is $181,145,000. Other Demographics

Lake County Demographic Profile

Population & People

Total Population

11,059

Income

Median Household Income

$73,792

Housing

Total Housing Units

5,658

Health

Without Healthcare Coverage

3.11%

Business & Economy

Total Businesses

331

Families

Total Households

4,576

Employment

Employment Rate

65.46%

Education

Bachelor's Degree or Higher

34.67%

Total Population: Total number of people from the 2020 U.S. Census for Lake, SD. 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.	11,059
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Lake, SD. 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.	11,098
Total Households: Total number of Households from the 2020 U.S. Census for Lake, SD. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	4,576
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.	5,658
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.	2.29
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.	2.84

Other Lake Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	4,867
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	254
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.	6,574
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	4,053
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	428

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	331
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$41,398,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$181,145,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	3,784

Sum of all ZIP Codes assigned Lake, SD as their primary County.

References

U.S. Postal Service [Last Updated: 5/1/2025], https://www.usps.com
ZIP-Codes.com Internal Data Creation [Last Updated: 5/1/2025], 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