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ZIP Code Database - Facts & Stats

Data Last Updated: March 1, 2023

ZIP Codes for City of Castlewood, SD

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Counties:HAMLIN, SD
Area Code(s):605
Timezone(s):Central (GMT -06:00)
City Population:627 (More Details)
CBSA:Watertown, SD
Congressional District(s):No Districts
Land Area:507 square miles (county)
Water Area:31 square miles (county)

1 ZIP Code

Castlewood, SD ZIP Code Boundaries

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Castlewood, SD Covers 1 ZIP Code

ZIP CodeTypePopulation% of PopulationAliases
57223Standard1,356100.00%KONES CORNER

Castlewood, SD Demographic Information *

Total population**627
Male population315
Female population312
Median age (years)36.2
White Population605
Black Population3
Indian Population3
Asian Population1
Hawaiian Population0
Hispanic Population11
Median age (Male)34.4
Median age (Female)39.4
Total households260
Family households (families)158
Average household size2.41
Average family size3.16
Total housing units292
* Demographic data is based on 2010 Census for the City of CASTLEWOOD.
** City and ZIP Code Population will not be equal due to differences in their geographies.


  1. U.S. Postal Service [Last Updated: 2/1/2023],
  2. Internal Data Creation [Last Updated: 2/1/2023],
  3. U.S. Geological Survey [Updated as needed],
  4. U.S. Census [Updated Yearly],
  5. U.S. Census 2010 [Decennial] [Last Updated: 1/1/2010],