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zipcodes.pro — STATE/SD/COUNTY/DAY

Day County, SD ZIP codes

There are 7 ZIP codes in Day County, SD, in 7 towns, from 57219 to 57468. The largest are 57274 (Webster), 57273 (Waubay) and 57219 (Bristol).

The county seat is Webster.

ZIP codes
7
Towns
7
County seat
Webster
County FIPS
46037
Population
5,437
Median household income
$66,033
Land area
1,028 sq mi

Day County ZIP codes by town

Webster (county seat)
57274

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 Day County ZIP codes

57219572395726157273572745742257468

The ZIP codes of Day 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.

Day County in numbers

About 5,437 people live in Day County, in 2,371 households, the 32nd most populous of South Dakota's 66 counties. The median household income is $66,033 a year, 12% below the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $173,600 (33% below the South Dakota median), and median gross rent is $660 a month. The median age is 44.8; 22.0% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 22 minutes.

Population5,437Day5,437
Households2,371Day2,371
Median age44.8Day44.8South Dakota38.0US 38.9
Median household income$66,033Day$66,033South Dakota$75,081US $80,734
Median home value$173,600Day$173,600South Dakota$257,400US $332,700
Median gross rent$660Day$660South Dakota$946US $1,413
Bachelor's degree or higher22.0%Day22.0%South Dakota31.9%US 35.7%
Mean commute22.3 minDay22.3 minSouth Dakota17.8 minUS 26.4 min
Population density5 / sq miDay5 / 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 Day County

Largest towns in Day County
TownZIP codesPopulation
Webster 1 1,896
Waubay 1 337
Bristol 1 275
Pierpont 1 161
Roslyn 1 147
Grenville 1 53
Andover 1 31

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 Day County.

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

Every ZIP code in Day County, with figures

ZIP codes in Day County
ZIP City Type Population Median income Median home
57219 Bristol , SD Standard 552 $51,900 $95,700
57239 Grenville , SD Standard 358 $106,389 $377,300
57261 Roslyn , SD Standard 277 $77,813 $167,500
57273 Waubay , SD Standard 1,165 $48,167 $177,400
57274 Webster , SD Standard 2,621 $68,083 $173,200
57422 Andover , SD Standard 174 $88,125 —
57468 Pierpont , SD Standard 279 $76,250 $112,500

Cite this page

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

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