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County ZIP codes · South Dakota · FIPS 46089

McPherson County, SD ZIP Codes

McPherson County, South Dakota has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 4 of the residential ones lie mainly in McPherson County and 4 mainly in a neighboring county; 7 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of McPherson County?

57437 · Eureka: $49k57448 · Hosmer: $67k57456 · Leola: $76k57457 · Long Lake: $140k57471 · Roscoe: $68k57481 · Westport: $68k58413 · Ashley: $51k58439 · Forbes: $74k584135743757471574565748157448584395745757437 · Eureka: $49k57448 · Hosmer: $67k57456 · Leola: $76k57457 · Long Lake: $140k57471 · Roscoe: $68k57481 · Westport: $68k58413 · Ashley: $51k58439 · Forbes: $74k584135743757471574565748157448584395745757437 · Eureka: $49k57448 · Hosmer: $67k57456 · Leola: $76k57457 · Long Lake: $140k57471 · Roscoe: $68k57481 · Westport: $68k58413 · Ashley: $51k58439 · Forbes: $74k5841357437574715745657481574485843957457
The residential ZIP codes of McPherson County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024). <$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 8 residential ZIP codes in McPherson County

4 ZIP codes lie mainly in McPherson County; 4 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in McPherson County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
57437 Eureka 1,074 2 $49k $87k 69%
57456 Leola 670 2 $76k $75k 97%
57448 Hosmer 404 2 $67k $64k 58%
57457 Long Lake 108 1 $140k – 100%

Partly in McPherson County

Residential ZIP codes mainly in another county that reach at least 1% into McPherson County, by their share here
In this county
58439 Forbes 385 2 $74k – 35%
57481 Westport 271 1 $68k $216k 31%
58413 Ashley 966 2 $51k $78k 7%
57471 Roscoe 546 1 $68k $79k 4%

Download the 8 ZIP codes as CSV

Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).

Which ZIP codes cross the county line?

7 ZIP codes of McPherson County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in McPherson County and in the neighboring counties
ZIPIn McPhersonElsewhere
5743769%Campbell County 31%
584137%McIntosh County 85%; Dickey County 8%
5745697%Edmunds County 3%
574714%Edmunds County 96%
5744858%Edmunds County 42%
5843935%Dickey County 63%; Brown County 2%
5748131%Brown County 56%; Edmunds County 12%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do McPherson County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. McPherson County's ZIP codes use 2 prefixes: 574 and 584.

Three-digit prefixes of McPherson County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are McPherson County's
PrefixSectional centerHereAll codes
574 Dakota Central, SD (SCF 572) 6 50
584 Fargo, ND (SCF 580) 2 62

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.