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zipcodes.pro — STATE/SD/COUNTY/SANBORN

Sanborn County, SD ZIP codes

Sanborn County, SD has 3 ZIP codes, in 3 towns: 57385, 57359 and 57314.

The county seat is Woonsocket.

ZIP codes
3
Towns
3
County seat
Woonsocket
County FIPS
46111
Population
2,384
Median household income
$78,750
Land area
569 sq mi
Metro area
Mitchell

Sanborn County ZIP codes by town

Woonsocket (county seat)
57385

Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.

Map of Sanborn County ZIP codes

573145735957385

The ZIP codes of Sanborn County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Sanborn County in numbers

About 2,384 people live in Sanborn County, in 946 households, the 53rd most populous of South Dakota's 66 counties. The median household income is $78,750 a year, 5% above the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $135,600 (47% below the South Dakota median), and median gross rent is $725 a month. The median age is 40.1; 21.3% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 21 minutes.

Population2,384Sanborn2,384
Households946Sanborn946
Median age40.1Sanborn40.1South Dakota38.0US 38.9
Median household income$78,750Sanborn$78,750South Dakota$75,081US $80,734
Median home value$135,600Sanborn$135,600South Dakota$257,400US $332,700
Median gross rent$725Sanborn$725South Dakota$946US $1,413
Bachelor's degree or higher21.3%Sanborn21.3%South Dakota31.9%US 35.7%
Mean commute21.2 minSanborn21.2 minSouth Dakota17.8 minUS 26.4 min
Population density4 / sq miSanborn4 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.

Largest towns in Sanborn County

Largest towns in Sanborn County
TownZIP codesPopulation
Woonsocket 1 759
Letcher 1 171
Artesian 1 148

Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.

Neighbouring counties

Counties that share a ZIP code with Sanborn County.

Not sure you are in Sanborn County? What county am I in? answers from your location, near a county line included.

Every ZIP code in Sanborn County, with figures

ZIP codes in Sanborn County
ZIP City Type Population Median income Median home
57314 Artesian , SD Standard 572 $85,515 $153,100
57359 Letcher , SD Standard 652 $106,818 $166,800
57385 Woonsocket , SD Standard 1,408 $70,404 $126,900

Cite this page

zipcodes.pro. “Sanborn County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/sd/county/sanborn

Underlying data is public domain or openly licensed — sources, vintages and licences.