Data Last Updated: May 1, 2025

Grant County, SD ZIP Codes

ZIP Codes: Shows how many general ZIP Codes, PO Boxes, Unique (Business), and Multi County ZIP Codes are associated with Grant, SD.	13 ZIP Codes (8 General, 0 PO Box, 0 Unique, & 5 Multi County) [More Details]
Area Code: The Telephone Area Code that are associated with Grant, 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 Grant, 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.	7,556 [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.	46051
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 Grant, 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.	681 square miles
Water Area: The approximate amount of water area covered by Grant, 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.	6 square miles
Coordinates: The latitude/longitude centroid coordinates for Grant County, SD.	-96.767676, 45.171932
Quick Link: Copy the direct link to the Grant, SDCounty page and use anywhere you like!	https://www.zip-codes.com/county/sd-grant.asp

Grant, SD ZIP Code Boundaries

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Grant County, SD Covers 13 ZIP Codes

ZIP Code	Classification	City	Population	% of Population
ZIP Code 56257 *	General	Marietta	421	--
ZIP Code 57216	General	Big Stone City	1,037	13.72%
ZIP Code 57227 *	General	Corona	421	--
ZIP Code 57246	General	Labolt	138	1.83%
ZIP Code 57251	General	Marvin	198	2.62%
ZIP Code 57252	General	Milbank	5,020	66.44%
ZIP Code 57256 *	General	Ortley	166	--
ZIP Code 57259	General	Revillo	453	6.00%
ZIP Code 57263 *	General	South Shore	434	--
ZIP Code 57264	General	Stockholm	219	2.90%
ZIP Code 57265	General	Strandburg	212	2.81%
ZIP Code 57266 *	General	Summit	599	--
ZIP Code 57269	General	Twin Brooks	387	5.12%

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

Important Grant, SD Information

Grant County, SD Covers 13 ZIP Codes. This includes 8 General ZIP Codes, 0 PO Box ZIP Codes, and 0 Unique (reserved for Business and Volume Mail Receivers). There are also 5 Multi County ZIP Codes. These records are assigned a different primary county, but they partially cover area in Grant County.

The population for Grant County is 7,556, according to the U.S. Census. Population Density is 11.10 persons per square mile. With 3,426 Housing Units, the Average Household Size is 2.35 persons. There are 3,103 Family Households with an Average Family Size of 2.78 persons. 8.60% of the population is without Health Insurance. The 65.91% Employment Rate is 6.11% above the national average of 59.8%.5,242 people aged 25+ have some educational achievement, with 25.54% (or 1,339 people) having attained a Bachelor's Degree or higher.More Demographics are available below.

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

ZIP Codes in Grant, SD have 3,176 Residential mailboxes and 208 Business mailboxes.There are 274 businesses with a total of 3,375 employees. That is an average of 12.3 employees per business. Annual payroll for these businesses is $174,903,000. Other Demographics

Grant County Demographic Profile

Population & People

Total Population

7,556

Income

Median Household Income

$73,818

Housing

Total Housing Units

3,426

Health

Without Healthcare Coverage

8.60%

Business & Economy

Total Businesses

274

Families

Total Households

3,103

Employment

Employment Rate

65.91%

Education

Bachelor's Degree or Higher

25.54%

Total Population: Total number of people from the 2020 U.S. Census for Grant, 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.	7,556
Current Population Estimate: This field gives the estimated household population for All ZIP Codes in Grant, 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.	7,263
Total Households: Total number of Households from the 2020 U.S. Census for Grant, SD. A Household includes everyone living in a residential housing unit. This includes families, roommates in a single residence, or a person living alone.	3,103
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.	3,426
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.	2.78

Other Grant Demographics

# Residential Mailboxes: The number of active residential delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	3,176
# Business Mailboxes: The number of active business delivery mailboxes and centralized units. This excludes PO Boxes and all other contract box types.	208
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.	3,818
Single Family Delivery Units: Total count of single family mail delivery receptacles; generally analogous to homes.	2,641
Multi Family Delivery Units: Total count of multifamily mail delivery receptacles; generally analogous to apartments.	325

# of Businesses: The total number of Business Establishments. Data taken from Business Census 2023.	274
1st Quarter Payroll: The total payroll for the first quarter. Data taken from Business Census 2023.	$39,693,000
Annual Payroll: The total annual payroll . Data taken from Business Census 2023.	$174,903,000
# of Employees: The total number of employees for all ZIP Codes in this City. Data taken from Business Census 2023.	3,375

Sum of all ZIP Codes assigned Grant, 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