Home > SD > Hamlin County > Castlewood > Zip 57223

Zip Code 57223 — Castlewood, SD

57223 is a ZIP Code associated with Castlewood, SD, located within Hamlin. The postal region supports an estimated population of 1,429 residents across Data Pending housing units, with a population density of 4.4 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (44.710190, -97.005670)

Data MetricLocal Statistic
Postal / Zip Code57223
Primary CityCastlewood
State / ProvinceSD
CountyHamlin
Total Population1,429
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density4.4 people/sq mi
TimezoneAmerica/Chicago

How 57223 Compares

MetricZIP 57223Hamlin CountySD State Average
Population1,4295,138906,188
Median IncomeData PendingN/AN/A
Population Density4.4 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 57234Estelline9.4 mi1,339N/A
Zip 57241Hayti10.4 mi936N/A
Zip 57248Lake Norden12.9 mi1,295N/A
Zip 57238Goodwin13.3 mi315N/A
Zip 57245Kranzburg13.4 mi151N/A

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 →