Castlewood city, South Dakota
Castlewood city profile, demographic data, and geographic information.
Castlewood city is a geographic entity located in Hamlin County, South Dakota. As of official census estimates, it has a reported population of 739. The land area covers 1.15 sq mi. [1]
Demographics & Population
| Demographic Metric | Estimate / Count | Margin of Error | Survey Period / Source |
|---|---|---|---|
| Total Population (2025 PEP Estimate) | 739 | — | 2025 / Census |
| Median Age | 36.5 yrs | ±3.6 | 2020-2024 / Census ACS 5-Year 2024 |
| Total Households | 292 | ±54 | 2020-2024 / Census ACS 5-Year 2024 |
Source: U.S. Census Bureau (PEP, ACS 5-Year).
Housing & Real Estate Profile
| Housing Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Total Housing Units | 307 | ±56 |
| Occupied Housing Units | 292 | ±54 |
| Vacant Housing Units | 15 | ±14 |
| Median Home Value | $198,200 | ±$26,332 |
| Median Gross Rent | $1,139 | ±$98 |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Economy & Workforce
| Economic Metric | Estimate / Value | Margin of Error |
|---|---|---|
| Median Household Income | $87,045 | ±$13,266 |
| Per Capita Income | $34,158 | ±$4,895 |
| Poverty Rate | 4.4% | ±3.3% |
| Population Below Poverty Level | 35 | ±27 |
| Unemployment Rate | 1.7% | ±1.9% |
| Civilian Labor Force, Employed | 450 | ±89 |
| Broadband Internet Rate | 80.1% | ±20% |
Source: U.S. Census Bureau ACS 5-Year (2020-2024).
Local Government & Public Administration
Authoritative general-purpose local government units serving this area
U.S. Census Bureau GUS (2026) / GMAF
| Government Unit | Unit Type | Jurisdiction Role | Contact / Address |
|---|---|---|---|
|
GUS Population: 716 (2024)
ID: 134575
|
Municipal | Official Local Government |
Contact: FINANCE OFFICER
PO BOX 17, CASTLEWOOD SD 57223-0017
|
|
COUNTY OF HAMLIN
GUS Population: 6,596 (2024)
ID: 112963
|
County | Official County Government |
Contact: HAMLIN CO AUDITOR
PO BOX 237, HAYTI SD 57241-0237
|
Education
Listing 10 local institutions (NCES 2024-2025)
External reference via K12Guides
| Institution | Type | Grades | Location |
|---|---|---|---|
| Regular School Castlewood | PK-05 | Castlewood, SD | |
| Regular School Castlewood | 09-12 | Castlewood, SD | |
| Regular School Castlewood | 06-08 | Castlewood, SD | |
| Regular School Castlewood | KG-08 | Castlewood, SD | |
| Regular School Nearby | PK-05 | Estelline, SD | |
| Regular School Nearby | 09-12 | Estelline, SD | |
| 6 Nearby | 14-17 | WATERTOWN, SD | |
| 5 Nearby | 3-11 | ESTELLINE, SD | |
| 6 Nearby | 2-13 | WATERTOWN, SD | |
| 6 Nearby | 2-13 | WATERTOWN, SD |
Source: k12guides.com.
Community Facilities & Infrastructure
Displaying 5 civic institutions across 2 datasets queried
CMS • IPEDS • IMLS
| Facility Name | Category | Relationship | Address / Location | Contact |
|---|---|---|---|---|
|
Lake Area Technical College
|
College | 12.7 mi away | 1201 Arrow Ave, Watertown, SD, 57201-0730 |
6058825284
|
|
HAMLIN-CODINGTON REGIONAL LIBRARY
|
Library | 12.3 mi away | 3 8TH AVE. SE, WATERTOWN, SD, 57201 |
(605) 753-1011
|
|
HAMLIN-CODINGTON REGIONAL LIBRARY-BOOKMOBILE
|
Library | 12.3 mi away | 3 8TH AVE SE, WATERTOWN, SD, 57201 |
(605) 753-1011
|
|
WATERTOWN REGIONAL LIBRARY
|
Library | 12.8 mi away | 160 6TH ST NE, WATERTOWN, SD, 57201 |
(605) 882-6220
|
|
CLEAR LAKE CITY LIBRARY
|
Library | 17.2 mi away | 125 3RD AVE S, CLEAR LAKE, SD, 57226 |
(605) 874-2013
|
Distances calculated from authoritative source coordinates. Source: CMS, IMLS, NCES IPEDS.
Climate & Weather Observations
NOAA Monthly Climate Normals
Observation Station: Climate data reflects NOAA 1991–2020 standard normals recorded at CASTLEWOOD #2, SD US, located 0.2 miles from Castlewood city. Local microclimates, topography, and elevation may cause municipal conditions to differ.
| Month | High (°F) | Low (°F) | Mean (°F) | Precip (in) | Snow (in) |
|---|---|---|---|---|---|
| January | 21.5° | 2.5° | 12.0° | 0.52" | — |
| February | 26.2° | 5.9° | 16.1° | 0.58" | — |
| March | 38.7° | 17.8° | 28.3° | 1.12" | — |
| April | 54.1° | 29.6° | 41.9° | 2.13" | — |
| May | 67.3° | 43.6° | 55.5° | 3.18" | — |
| June | 77.5° | 54.2° | 65.9° | 3.97" | — |
| July | 82.5° | 58.5° | 70.5° | 3.49" | — |
| August | 80.5° | 56.1° | 68.3° | 3.08" | — |
| September | 72.4° | 47.3° | 59.9° | 2.69" | — |
| October | 57.8° | 33.7° | 45.8° | 2.28" | — |
| November | 41.0° | 20.7° | 30.9° | 0.76" | — |
| December | 26.9° | 8.7° | 17.8° | 0.53" | — |
Source: NOAA U.S. Climate Normals (1991–2020).
Local Weather Forecast
Weather forecast data is currently unavailable in the local cache.
Nearby Cities & Communities
Listing adjacent communities by spatial proximity (miles)
Proximity discovery
| Community Name | Classification | Distance | Population |
|---|---|---|---|
| Castlewood city | City | 0.0 mi | — |
| Claremont Colony CDP | CDP | 4.0 mi | — |
| Poinsett Colony CDP | CDP | 8.6 mi | — |
| Hayti town | Town | 9.6 mi | — |
| Lake Poinsett CDP | CDP | 11.2 mi | — |
| Estelline city | City | 12.0 mi | — |
Sources & Data Provenance
- Geographic Classification & Identifiers: U.S. Census Bureau Gazetteer (2026) and TIGER/Line Shapefiles. GEOID: 4605710500. • Official Source Dataset →
- Socioeconomic & Housing Metrics: U.S. Census Bureau American Community Survey (ACS) 5-year estimates and Population Estimates Program (PEP). Margin of Error (MOE) intervals are reported where published; suppressed values are never estimated or replaced with false zeros.
- Civic Directory Datasets: Centers for Medicare & Medicaid Services (CMS Hospital Directory), National Center for Education Statistics (NCES IPEDS Postsecondary Directory), and Institute of Museum and Library Services (IMLS Public Libraries Survey). Airport landing facilities are provided by airport-data.com.
- Weather & Climate Observations: National Oceanic and Atmospheric Administration (NOAA) U.S. Climate Normals 1991–2020 and National Weather Service (NWS) point forecasts.