Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — STATE/SD/COUNTY/CLARK

Clark County, SD ZIP codes

Clark County, SD has 6 ZIP codes, in 6 towns: 57225, 57278, 57236, 57217, 57271 and 57258. 2 more cross into it from neighbouring counties: 57322 and 57434.

The county seat is Clark.

ZIP codes
6
Partly in it
2 more
Towns
6
County seat
Clark
County FIPS
46025
Population
3,917
Median household income
$70,726
Land area
958 sq mi

Clark County ZIP codes by town

Clark (county seat)
57225

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.

ZIP codes partly in Clark County

These ZIP codes lie mostly in a neighbouring county but each cover a twentieth or more of Clark County.

Map of Clark County ZIP codes

572175722557236572585727157278

The ZIP codes of Clark 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.

Clark County in numbers

About 3,917 people live in Clark County, in 1,336 households, the 41st most populous of South Dakota's 66 counties. The median household income is $70,726 a year, 6% below the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $158,400 (38% below the South Dakota median), and median gross rent is $782 a month. The median age is 40.3; 19.7% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 21 minutes.

Population3,917Clark3,917
Households1,336Clark1,336
Median age40.3Clark40.3South Dakota38.0US 38.9
Median household income$70,726Clark$70,726South Dakota$75,081US $80,734
Median home value$158,400Clark$158,400South Dakota$257,400US $332,700
Median gross rent$782Clark$782South Dakota$946US $1,413
Bachelor's degree or higher19.7%Clark19.7%South Dakota31.9%US 35.7%
Mean commute20.8 minClark20.8 minSouth Dakota17.8 minUS 26.4 min
Population density4 / sq miClark4 / 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 Clark County

Largest towns in Clark County
TownZIP codesPopulation
Clark 1 1,359
Willow Lake 1 433
Raymond 1 82
Bradley 1 78
Garden City 1 78
Vienna 1 49

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 Clark County.

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

Every ZIP code in Clark County, with figures

ZIP codes in Clark County
ZIP City Type Population Median income Median home
57217 Bradley , SD Standard 142 $64,125 $95,000
57225 Clark , SD Standard 1,833 $66,875 $155,100
57236 Garden City , SD Standard 91 $84,167 $63,000
57258 Raymond , SD Standard 510 $58,295 —
57271 Vienna , SD Standard 246 $85,524 $307,800
57278 Willow Lake , SD Standard 1,011 $70,208 $220,400

Cite this page

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

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