Castlewood, SD
Population 756 · South Dakota
About Castlewood, SD
Castlewood is a small community located in South Dakota with a population of 756 residents according to the latest US Census Bureau American Community Survey data. The median household income is $87,768 per year, which is 17% above the national median of $75,149. The median age of 36.9 years is close to the US median age of 38.9 years.
Housing Market Overview
The housing market in Castlewood features a median home value of $178,600, which is 27% below the national median of $244,900. This positions Castlewood in a moderately priced market relative to the rest of the country. Median monthly rent is $1,028, 12% below the national average of $1,163/month. Of the 285 total housing units, 84% are owner-occupied (232 units) and 16% are renter-occupied (45 units). The high homeownership rate suggests a stable, established residential community.
Economy & Employment
The local economy in Castlewood shows an unemployment rate of 2.1%, which is lower than the national rate of 3.7%, indicating a relatively strong job market. The poverty rate stands at 3.0%, below the national average of 12.4%, reflecting generally favorable economic conditions. Workers in Castlewood have an average one-way commute time of 24.4 minutes.
Education & Demographics
25.7% of Castlewood residents aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. This is in line with national trends in educational attainment. The community's demographic composition includes 0.3% White, 5.7% Hispanic or Latino, 0.0% Black or African American, and 0.4% Asian residents, with 0.8% of the population being foreign-born.
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.
Compare Castlewood With Other Cities
Frequently Asked Questions about Castlewood
What is the population of Castlewood, SD?
The population of Castlewood, SD is 756 according to the latest US Census Bureau American Community Survey estimates. This makes it a small community in South Dakota.
What is the median household income in Castlewood?
The median household income in Castlewood, SD is $87,768 per year, which is 17% above the national median of $75,149.
What is the median home value in Castlewood?
The median home value in Castlewood, SD is $178,600, which is 27% below the national median of $244,900. The majority of housing units are owner-occupied.
What is the average rent in Castlewood?
The median monthly rent in Castlewood, SD is $1,028, which is 12% below the national average of $1,163/month.
What is the unemployment rate in Castlewood?
The unemployment rate in Castlewood, SD is 2.1%, compared to the national average of 3.7%. This lower-than-average rate suggests a relatively healthy local job market.
Is Castlewood, SD a good place to live?
Castlewood offers above-average incomes, affordable housing, and a strong job market. With a population of 756 and a median age of 36.9, the city appeals to a broad range of residents.
How educated is Castlewood, SD?
25.7% of residents in Castlewood aged 25 and older hold a bachelor's degree or higher, compared to the national average of 33.7%. The educational profile reflects the area's industry mix and employment landscape.
What is the cost of living in Castlewood?
Key cost-of-living indicators for Castlewood, SD: median home value is $178,600 (27% below national), median rent is $1,028/month, and median household income is $87,768. The home-value-to-income ratio is 2.0x, indicating relatively affordable housing relative to local incomes.
What is the poverty rate in Castlewood?
The poverty rate in Castlewood, SD is 3.0%, compared to the national average of 12.4%. This below-average poverty rate reflects generally favorable economic conditions in the community.
How diverse is Castlewood, SD?
Castlewood's population is 0.3% White, 5.7% Hispanic or Latino, 0.0% Black or African American, 0.4% Asian, and 0.7% two or more races. 0.8% of residents are foreign-born.