Castlewood, SD
Population 756 · South Dakota
About Castlewood, SD
Castlewood is a small community in South Dakota with a population of 756 residents. The median household income is $87,768 per year, which is above the national average. The median age in Castlewood is 36.9 years.
Housing in Castlewood has a median home value of $178,600 and median monthly rent of $1,028. Of the 285 total housing units, the majority are owner-occupied, with 232 owner-occupied and 45 renter-occupied units.
The unemployment rate in Castlewood is 2.1% and the poverty rate is 3.0%. 25.7% of residents hold a bachelor's degree or higher. The average commute time is 24.4 minutes.
Cost of Living in Castlewood, SD
Compared to national averages, Castlewood has a median household income of $87,768 (17% above the national median of $75,149). Home values average $178,600, which is 27% below the national median. Monthly rent at $1,028 is 12% below the US average of $1,163. Within South Dakota, Castlewood's income is 36% above the state average of $64,650, and home values are 24% above the state median of $143,757.
Why Live in Castlewood, SD?
Castlewood offers a strong local economy with a median household income of $87,768, well above the national average, and affordable housing with a median home value of $178,600, below the US average of $244,900, and rent that’s lower than the national average at $1,028/month. Additionally, the city features a strong job market with an unemployment rate of just 2.1%, and a low poverty rate of 3.0%, better than the national average, and short commute times averaging just 24.4 minutes.
Castlewood has a population of 756 with a median age of 36.9 years. Compare Castlewood with other cities to see how it stacks up, or explore all cities in South Dakota.
Similar Cities Near Castlewood
Cities in South Dakota with a similar population size.
| City | Population | Median Income | Home Value | |
|---|---|---|---|---|
| Woonsocket | 753 | $52,283 | $94,200 | Compare |
| Bryant | 761 | $60,592 | $136,700 | Compare |
| Wessington Springs | 747 | $46,750 | $96,000 | Compare |
| Whitewood | 746 | $67,250 | $214,200 | Compare |
| Wanblee | 744 | $0 | $0 | Compare |
| Lake Norden | 769 | $71,923 | $201,400 | Compare |
| Menno | 736 | $61,250 | $103,200 | Compare |
| Lower Brule | 777 | $31,667 | $22,500 | Compare |
Demographics
Racial & Ethnic Composition
Economy & Education
Housing
Other Cities in South Dakota
Data source: US Census Bureau ACS 5-Year Estimates. Last updated: 2026-04-05.
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Frequently Asked Questions about Castlewood
What is the population of Castlewood, SD?
The population of Castlewood, SD is 756 according to the latest Census data.
What is the median household income in Castlewood?
The median household income in Castlewood, SD is $87,768 per year.
What is the median home value in Castlewood?
The median home value in Castlewood, SD is $178,600.
What is the average rent in Castlewood?
The median monthly rent in Castlewood, SD is $1,028.
What is the unemployment rate in Castlewood?
The unemployment rate in Castlewood, SD is 2.1%.