ZIP code · Eureka · South Dakota · United States
ZIP code 57437 — Eureka
ZIP code 57437 serves Eureka, South Dakota.
- Postal code
- 57437Single source Value from one source, not cross-checked.
- City
- Eureka
- County
- McPherson
- State
- South Dakota
- Country
- United States
- Coordinates
- 45.7707, -99.3308 — precision precise (locality)
View on OpenStreetMap - Population
- 1,278 (ZCTA, ACS 5-year)
- Median household income
- $42,917
- Median age
- 60.4
- Time zone
- America/Chicago (UTC−6 / UTC−5 DST)
Nearby localities
About this page
US ZIP codes have five digits. They are postal routing areas, not administrative boundaries: a ZIP can span more than one city or county, and the city shown is the primary USPS name for that code.
GeoNames · U.S. Census Bureau (ACS). Data generated on 2026-08-21. Methodology · Report an error on this page