ZIP codes in McPherson County
6 ZIPs touch McPherson County, South Dakota. The blue dashed line is the county border; orange ZIPs reach into it.
6
ZIP codes
5
cross the county line
3,073
people in these ZIPs
66
counties in SD
Most people
McPherson County ZIP list
More counties in South Dakota
- Lake County14
- Lawrence County9
- Lincoln County12
- Lyman County9
- Marshall County8
- McCook County12
- Meade County19
- Mellette County7
- Miner County9
- Minnehaha County29
- Moody County11
- Oglala Lakota County10
Questions people actually ask
How many ZIP codes are in McPherson County, South Dakota?
6 ZIP codes reach into McPherson County. 5 of them are only partly in the county and also cover a neighboring county.
Which ZIP code in McPherson County has the most people?
57437 (Eureka) has about 1,074 residents, the most of any ZIP touching McPherson County, in the Census Bureau’s ACS 2020–2024 estimates.
Can a ZIP code be in McPherson County and another county?
Yes. ZIP codes follow mail routes, not county lines. Rows marked with a percentage show how much of that ZIP’s land is in McPherson County. For one address, pin the exact spot on the ZIP finder to see its county.
Where does this list come from?
ZIP areas and their county overlaps come from the Census Bureau’s 2020 ZIP Code Tabulation Area to county relationship file. PO Box ZIPs have no area, so each is placed in the county of the ZIP area nearest the town it serves.
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Updated 2026-11-10 · Where the data comes from