ZIP Code 57223
About Castlewood
Castlewood is a city in Hamlin County, South Dakota, United States. It is part of the Watertown, South Dakota Micropolitan Statistical Area. The population was 698 at the 2020 census, and was estimated to be 707 in 2022.
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Area Profile
US Census (ACS 5-year · Gazetteer)
1,367
population
$88,571
median household income
11
people / sq mi
$229,500
median home value
$1,096
median gross rent
36.9
median age
548
housing units
494
households
124.6
land area (sq mi)