What is the population of Castlewood?

The population of Castlewood, SD is 247.

Where is Castlewood located?

Castlewood, SD is located at latitude 44.7227400 and longitude -97.0300700. It is in United States.

What is the elevation of Castlewood?

Castlewood, SD has an elevation of 514 meters (1686 feet) above sea level.

What time zone is Castlewood in?

Castlewood, SD is in the America/Chicago time zone.

What state is Castlewood in?

Castlewood is in the state of South Dakota, United States.

What county is Castlewood, SD in?

Castlewood is in Hamlin County, South Dakota.

How has the population of Castlewood changed?

The population of Castlewood, SD has increased from 226 (2010) to 247 (2020), a change of 9.3%.

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Castlewood, South Dakota

Castlewood: township in Hamlin County, South Dakota

About

Castlewood is a township located in the county of Hamlin in the U.S. state of South Dakota. Its population at the 2010 census was 226. After 10 years in 2020 city had an estimated population of 247 inhabitants.

Quick Facts about Castlewood

Population	247 (2020)
Country	United States of America
State	South Dakota (United States)
County	Hamlin County
Latitude & Longitude	44.7227,-97.0301
Time Zone	America/Chicago
Local time	18:23:41 (22nd April 2026)
Postal code	57223
Population growth	8.5% (2010-2020)
Weather	83℉ Sunny 7-days weather

Geography

Castlewood is located at 44°43'22"N 97°1'48"W (44.7227400, -97.0300700).

Castlewood map

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Weather

83°F

Sunny

14 to 26 mph SSE Wednesday

Sunny, with a high near 83. South southeast wind 14 to 26 mph, with gusts as high as 37 mph.

7-Day Forecast

Demographics

The population of Castlewood increased by 8.5% in 10 years.

Year	Population	% Change	Method
2010	226	-	census
2011	229	1.31%	estimation process
2012	230	0.43%	estimation process
2013	232	0.86%	estimation process
2014	234	0.85%	estimation process
2015	234	0%	estimation process
2016	232	-0.86%	estimation process
2017	237	2.11%	estimation process
2018	241	1.66%	estimation process
2019	244	1.23%	estimation process
2020	247	1.21%	estimation process

Castlewood zip code is 57223. County name: Hamlin, County fips: 46057

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Nearby Schools and Colleges

Schools and campuses linked to Castlewood, SD. Select a name to open its map and contact details.

Code	Name	City	ZIP
219143	Lake Area Technical College	Watertown (SD)	57201-0730
219356	South Dakota State University	Brookings (SD)	57007-1898

Nearby Post Offices

Closest post offices linked to Castlewood.

Post Office Name	City	ZIP
Castlewood Post Office	Castlewood (SD)	57223

Other places with the same name (1)

Castlewood, Colorado city in Hamlin County, South Dakota, United States with a population of 25,271 people.

Other cities in Hamlin County

Cities, towns, neighborhoods & other populated places in Hamlin County , SD.

City Name	Population	Title
Lake Norden	540	City in South Dakota, United States of America
Estelline	351	Township in Hamlin County, South Dakota
Bryant	330	City in Hamlin County, South Dakota, United States.
Hayti	309	Township in Hamlin County, South Dakota
Dempster	271	Township in Hamlin County, South Dakota
Hazel	86	Town in South Dakota, United States of America