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/MCPHERSON

McPherson County, SD ZIP codes

McPherson County, SD has 4 ZIP codes, in 4 towns: 57437, 57456, 57448 and 57457. 2 more cross into it from neighbouring counties: 57481 and 58439.

The county seat is Leola.

ZIP codes
4
Partly in it
2 more
Towns
4
County seat
Leola
County FIPS
46089
Population
2,145
Median household income
$66,906
Land area
1,137 sq mi

McPherson County ZIP codes by town

Leola (county seat)
57456

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 McPherson County

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

Map of McPherson County ZIP codes

57437574485745657457

The ZIP codes of McPherson 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.

McPherson County in numbers

About 2,145 people live in McPherson County, in 915 households, the 56th most populous of South Dakota's 66 counties. The median household income is $66,906 a year, 11% below the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $85,600 (67% below the South Dakota median), and median gross rent is $594 a month. The median age is 50.0; 26.5% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 18 minutes.

Population2,145McPherson2,145
Households915McPherson915
Median age50.0McPherson50.0South Dakota38.0US 38.9
Median household income$66,906McPherson$66,906South Dakota$75,081US $80,734
Median home value$85,600McPherson$85,600South Dakota$257,400US $332,700
Median gross rent$594McPherson$594South Dakota$946US $1,413
Bachelor's degree or higher26.5%McPherson26.5%South Dakota31.9%US 35.7%
Mean commute18.4 minMcPherson18.4 minSouth Dakota17.8 minUS 26.4 min
Population density2 / sq miMcPherson2 / 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 McPherson County

Largest towns in McPherson County
TownZIP codesPopulation
Eureka 1 778
Leola 1 381
Hosmer 1 289
Long Lake 1 14

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 McPherson County.

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

Every ZIP code in McPherson County, with figures

ZIP codes in McPherson County
ZIP City Type Population Median income Median home
57437 Eureka , SD Standard 1,074 $49,276 $86,700
57448 Hosmer , SD Standard 404 $66,538 $64,300
57456 Leola , SD Standard 670 $75,833 $75,400
57457 Long Lake , SD Standard 108 $140,417 —

Cite this page

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

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