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Castlewood, SD
City in Hamlin County, South Dakota.
Population
804
Land area
1.2sq mi
People per sq mi
699
ZIP codes
0
Castlewood and its ZIP codes
Castlewood at a glance
- Castlewood is about 58 times as dense as South Dakota as a whole.
- The median household income is $87,045, 16% above the South Dakota median of $75,081.
- A typical owner-occupied home is valued at $198,200 (23% below South Dakota) and median rent is $1,139 a month.
Local data for Castlewood, SD
Counts from official public data
Housing and community stats
Castlewood, SD, American Community Survey 2020-2024
Median household income
$87,045
Poverty rate
4.4%
Median home value
$198,200
Median rent
$1,139/mo
Homeownership
82.5%
Bachelor's or higher
25.0%
Median age
36.5
Average commute
25.2 min
Largest reported origins and ancestries: German Americans (371), Norwegian Americans (99), Dutch Americans (82).
Economy and federal money
Jobs, pay, income and spending are for Hamlin County. PPP loans are for Castlewood.
Unemployment rate
1.5%
Aug 2026, 0.0 pts in a year
Average annual pay
$58,566
2,703 jobs, 2025
Income per person
$70,519
BEA, 2024
Federal spending
$39.7M
FY 2026, $6,447 per person
How people get to work
Castlewood, SD, workers 16 and older. American Community Survey 5-year estimates
- Drove alone79.5%
- Carpooled14.4%
- Public transit0.0%
- Walked2.5%
- Bicycle0.0%
- Taxi, ride-hailing, motorcycle or other0.0%
- Worked from home3.6%
Average one-way commute: 25.2 minutes for people who do not work from home.
Environment and hazard risk
Castlewood, SD, from FEMA, NOAA and EPA
Natural hazard risk
Very Low
Top: ice storm
Storm events since 1996
586
Countywide, mostly hail
Flood insurance policies
61
1.7% of homes, county
July high / Jan low
83° / 3°F
24.3 inches of rain a year
Hazards, floods and storm historyCheck a flood zone1 historic places
Health statistics
Share of adults in Castlewood, SD, CDC PLACES estimates
Obesity
35.3%
U.S. 33.3% +2.0 pts
Diabetes
9.9%
U.S. 12.1% -2.2 pts
Smoking
14.4%
U.S. 12.8% +1.6 pts
Uninsured (18-64)
7.9%
U.S. 11.1% -3.2 pts
Cities near Castlewood
| Name | Distance | Land area (sq mi) |
|---|---|---|
| Claremont ColonyCensus-designated place | 4.2 mi | 0.3 |
| Poinsett ColonyCensus-designated place | 8.7 mi | 0.3 |
| HaytiTown | 9.4 mi | 0.5 |
| Lake PoinsettCensus-designated place | 11 mi | 4.9 |
| EstellineCity | 12 mi | 0.9 |
| KranzburgTown | 13 mi | 0.8 |
| Lake NordenCity | 13 mi | 0.9 |
| WatertownCity | 14 mi | 18.4 |
| GoodwinTown | 14 mi | 0.5 |
| HazelTown | 17 mi | 0.2 |
| Clear LakeCity | 18 mi | 3.3 |
| BadgerTown | 18 mi | 1.1 |
| AltamontTown | 19 mi | 1.3 |
| WaverlyCensus-designated place | 19 mi | 1 |
| BrandtTown | 21 mi | 1.3 |
| BruceCity | 21 mi | 0.4 |
Frequently asked questions
- What county is Castlewood, SD in?
- Castlewood is in Hamlin County, South Dakota.
- What is the population of Castlewood, SD?
- About 804 people live in Castlewood, based on American Community Survey 5-year estimates.
- What cities are near Castlewood?
- Nearby places include Claremont Colony (4.2 mi), Poinsett Colony (8.7 mi), Hayti (9.4 mi), Lake Poinsett (11 mi), Estelline (12 mi).
Source: U.S. Census Bureau (TIGER/Line boundaries, American Community Survey) · Data as of 12/31/2023