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zipcodes.pro — CITY/SD/CASTLEWOOD

Castlewood ZIP code, South Dakota

The ZIP code for Castlewood, SD is 57223, and its area code is 605.

USPS city name
1 ZIP code
Population
804
Area code
605

Castlewood in numbers

About 804 people live in Castlewood, in 292 households. The median household income is $87,045 a year, 16% above the South Dakota median of $75,081 (US: $80,734). The median owner-occupied home is valued at $198,200 (23% below the South Dakota median), and median gross rent is $1,139 a month. The median age is 36.5; 25.0% of adults 25 and over hold a bachelor's degree or higher (31.9% across South Dakota); the average commute takes 25 minutes.

Population804Castlewood804
Households292Castlewood292
Median age36.5Castlewood36.5South Dakota38.0US 38.9
Median household income$87,045Castlewood$87,045South Dakota$75,081US $80,734
Median home value$198,200Castlewood$198,200South Dakota$257,400US $332,700
Median gross rent$1,139Castlewood$1,139South Dakota$946US $1,413
Bachelor's degree or higher25.0%Castlewood25.0%South Dakota31.9%US 35.7%
Mean commute25.2 minCastlewood25.2 minSouth Dakota17.8 minUS 26.4 min
Population density699 / sq miCastlewood699 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Castlewood city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Castlewood

ZIP codes with the USPS city name Castlewood
ZIP City Type Population Median income Median home
57223 Castlewood , SD Standard 1,429 $92,424 $236,600

Map of Castlewood ZIP codes

57223

The ZIP codes of Castlewood, SD, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Castlewood

The nearest larger towns are Estelline (831 people, 12 mi), Lake Norden (889 people, 13 mi) and Watertown (23,044 people, 14 mi).

Towns near Castlewood
TownPopulationDistance
Watertown 23,044 14.2 mi

More nearby: every ZIP code in Hamlin County · South Dakota ZIP codes

Cite this page

zipcodes.pro. “Castlewood, SD ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/sd/castlewood

Underlying data is public domain or openly licensed — sources, vintages and licences.