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Zip Code 57437 — Eureka, SD

ZIP Code 57437 is associated with Eureka, SD, in McPherson County. The listed population estimate is 1,074; estimated density is 0.8 people per square mile. Among records with population estimates, it ranks #1 of 4 in McPherson County and #134 of 372 in SD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (45.783680, -99.618000)

Data MetricLocal Statistic
Postal / Zip Code57437
Primary CityEureka
State / ProvinceSD
CountyMcPherson
Total Population1,074
Population Density0.8 people/sq mi
TimezoneAmerica/Chicago

How 57437 Compares

MetricZIP 57437McPherson County recordsSD records
Population estimate1,0742,256 (sum)906,188 (sum)
Population Density0.8 /sq mi----
County population rank#1 of 4----
State population rank#134 of 372----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in SD

ZIP CodeCityDistancePopulation estimate
ZIP 57448Hosmer15.3 mi404
ZIP 57632Herreid21.0 mi757
ZIP 57452Java21.5 mi136
ZIP 57646Mound City22.0 mi272
ZIP 57457Long Lake23.0 mi108

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →