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Zip Code 57312 — Alpena, SD

ZIP Code 57312 is associated with Alpena, SD, in Beadle County. The listed population estimate is 596; estimated density is 1.8 people per square mile. Among records with population estimates, it ranks #4 of 8 in Beadle County and #189 of 372 in SD.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (44.196460, -98.385640)

Data MetricLocal Statistic
Postal / Zip Code57312
Primary CityAlpena
State / ProvinceSD
CountyBeadle
Total Population596
Population Density1.8 people/sq mi
TimezoneAmerica/Chicago

How 57312 Compares

MetricZIP 57312Beadle County recordsSD records
Population estimate59619,796 (sum)906,188 (sum)
Population Density1.8 /sq mi----
County population rank#4 of 8----
State population rank#189 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 57358Lane8.6 mi15
ZIP 57379Virgil8.9 mi120
ZIP 57385Woonsocket11.4 mi1,408
ZIP 57384Wolsey16.2 mi1,077
ZIP 57350Huron16.5 mi16,199

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 →