Castlewood, SD demographics:
population, income, and more

Total population
804
6.3% year-over-year change
Median household income
$87,045/yr
-0.8% year-over-year change
Housing units
307
7.7% year-over-year change

Castlewood population

How many people live in Castlewood

Castlewood is home to 804 residents, according to the most recent Census data. Gender-wise, 52.7% of Castlewood locals are male, and 47.3% are female.

Total population
804
6.3% year-over-year change
Gender ratio
Male
52.7%
424
Female
47.3%
380
Value Percent YoY change
Male 424 52.7% 12.2%
Female 380 47.3% 0.5%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Castlewood is 36, with the population distributed as follows: about 26.1% are children under 15, then 11.1% are in the 15 to 24 age group. Adults between 25 and 44 make up 25% of the population, while another 26.5% fall into the 45 to 64 bracket. Finally, around 11.3% are 65 or older.

Median age
36.5
Age breakdown
Under 15
26.1%
15 to 24
11.1%
25 to 44
25%
45 to 64
26.5%
Over 65
11.3%
Value Percent YoY change
Under 15 210 26.1% 1.9%
15 to 24 89 11.1% 18.7%
25 to 44 201 25% 2.0%
45 to 64 213 26.5% 17.0%
Over 65 91 11.3% -5.2%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Castlewood, 99% of the population are US-born citizens, while 0.5% have gained naturalized citizenship. At the same time, 0.5% of residents are non-citizens. There’s also a share of 7.3% that includes residents with two or more races.

Citizenship
U.S.-born citizens
99%
Non-U.S.-born citizens
0.5%
Non-citizens
0.5%
Value Percent YoY change
U.S.-born citizens 796 99% 6.7%
Non-U.S.-born citizens 4 0.5% -20.0%
Non-citizens 4 0.5% -20.0%
Racial breakdown
White
90.8%
Black or African American
0.6%
American Indian and Alaska Native
0%
Asian
0%
Native Hawaiian and other Pacific Islander
0%
Two or more races
7.3%
Other
1.2%
Value Percent
White 730 90.8%
Black or African American 5 0.6%
Two or more races 59 7.3%
Other 10 1.2%

Households in Castlewood

A peek inside Castlewood households

Castlewood has 292 households, with an average of 3 members in each. Of these, 74.7% are families, while the remaining 25.3% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
292
5.4% year-over-year change
Average people per household
3
Non-family households
74
Family households
218
Value Percent YoY change
Non-family households 74 25.3% -3.9%
Family households 218 74.7% 9.0%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Castlewood

The housing landscape of Castlewood

Castlewood's housing consists of 307 units, with 85.3% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 2.6% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 2.6% of the housing landscape.

Housing units
307
7.7% year-over-year change
Housing types
Value Percent
1 unit, detached 262 85.3%
1 unit, attached 8 2.6%
2 units 1 0.3%
3 or 4 units 3 1%
5 to 9 units 18 5.9%
10 to 19 units 5 1.6%
Mobile home 8 2.6%
Boat, RV, van, etc. 2 0.6%
Homes built since 2020
2
% year-over-year change

The age of buildings in Castlewood

In Castlewood, the median construction year is 1973. About 33.9% of homes were built before the 1940s, with another 2.3% going up by 1949. Most development happened in the second half of the 20th century. Then, 14.3% of homes were added from 2000 to 2009, 7.8% between 2010 and 2019, and 0.6% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 104 33.9% 15.6%
Built between 1940 and 1949 7 2.3% -12.5%
Built between 1950 and 1959 18 5.9% -10.0%
Built between 1960 and 1969 10 3.3% -9.1%
Built between 1970 and 1979 50 16.3% 8.7%
Built between 1980 and 1989 13 4.2% -35.0%
Built between 1990 and 1999 35 11.4% 34.6%
Built between 2000 and 2009 44 14.3% 33.3%
Built between 2010 and 2019 24 7.8% -22.6%
Built in 2020 or later 2 0.6% N/A
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Castlewood occupancy rates

Out of the 292 occupied housing units in Castlewood, 82.5% are owner-occupied, while 17.5% are lived in by tenants. Meanwhile, 4.9% of all homes on the local market sit vacant.

Occupied housing units
292
5.4% year-over-year change
Occupancy breakdown
Renter occupied
51
Owner occupied
241
Value Percent YoY
change
Renter occupied 51 17.5% 13.3%
Owner occupied 241 82.5% 3.9%
Unoccupied housing units
4.9%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Castlewood housing costs

Housing costs in Castlewood come to a median of $1,028 per month, while tenants specifically pay a median gross rent of $1,139.

Median housing costs per month
$1,028/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Castlewood
$1,139/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Castlewood

Castlewood education at a glance

About 40.3% of the population in Castlewood went to high school, while 16.7% pursued college studies. Another 18.9% earned an associate degree and 18.7% hold a bachelor’s. Meanwhile, 4.6% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 4 0.7% -20.0%
High school diploma 217 40.3% 12.4%
College diploma 90 16.7% -11.8%
Associate degree 102 18.9% 22.9%
Bachelor's degree 101 18.7% -2.9%
Graduate degree 25 4.6% 38.9%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Castlewood

How much people earn in Castlewood

The average annual household income in Castlewood was $92,403 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +2.1% change from the previous year. At the same time, the median income stood at $87,045, reflecting a -0.8% shift over the same period.

Average household income in Castlewood
$92,403/year
2.1% year-over-year change
Median household income in Castlewood
$87,045/year
-0.8% year-over-year change

Castlewood income by age

In Castlewood, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $91,000. Those with someone between 45 and 64 in charge, often well established professionally, earn $94,583 overall. Overall, 95.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $91,000 7.8%
45 - 64 $94,583 -1.7%
Over 65 $47,500 5.6%
Above poverty level
763
Below poverty level
35
Value Percent YoY
change
Above poverty level 763 95.6% 5.1%
Below poverty level 35 4.4% 52.2%

Average renter income in Castlewood

To get a better sense of what renters earn on average in Castlewood, their median household income was $43,375 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 31.5%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$43,375
Rent-to-income ratio
31.5%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Castlewood

Workforce and job types in Castlewood

The job market in Castlewood is powered by 450 working residents, spread across a range of industries and roles. 65.3% of the working population are employed in professional or administrative positions, while 34.7% are in hands-on or service-based jobs. Also, 5.6% run their own businesses, 64.4% are employed by private companies, and 22.7% work in the public sector.

Workforce demographics

Working population
450
9.2% year-over-year change
White collar
294
Blue collar
156
Value Percent YoY change
White collar 294 65.3% 11.8%
Blue collar 156 34.7% 4.7%
Employer type
Self employees
5.6%
Private companies
64.4%
Governmental workers
22.7%
Not for profit companies
7.3%
Value Percent YoY change
Self employees 25 5.6% -10.7%
Private companies 290 64.4% 7.8%
Governmental workers 102 22.7% 15.9%
Not for profit companies 33 7.3% 22.2%
Unemployment rate
1.8%
-11.1% year-over-year change

Available workforce

The unemployment rate in Castlewood stands at 1.8%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Castlewood

How people get around in Castlewood

In Castlewood, the average commute time is 25 minutes. Commuting methods vary: 93.8% of residents travel by personal vehicle and 2.5% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Commute time
25 min
3.3% year-over-year change
Means of transportation
Value Percent YoY change
Car 412 93.8% 7.8%
Walk 11 2.5% 37.5%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Castlewood by zipcode?

Zipcode Population Number of households Median income Average income
57223 1,429 510 $92,424 $110,949

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FAQs about Castlewood demographics 

What is the total population of Castlewood?

Castlewood has a total population of 804 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +6.3% compared to a year ago.

What is the gender ratio in Castlewood?

The gender ratio in Castlewood is as follows:
  • 52.7% males (424 residents)
  • 47.3% females (380 residents)

What is the median age in Castlewood?

The median age in Castlewood is 36.5.

What is the age distribution of the population in Castlewood?

The age distribution in Castlewood is as follows:
  • Under 15: 26.1% (210 residents)
  • Ages 15-24: 11.1% (89 residents)
  • Ages 25-44: 25% (201 residents)
  • Ages 45-64: 26.5% (213 residents)
  • Over 65: 11.3% (91 residents)

What is the racial and ethnic makeup of Castlewood?

The racial and ethnic makeup of Castlewood is as follows:
  • White: 90.8% (730 residents)
  • Black or African American: 0.6% (5 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 0% (0 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 7.3% (59 residents)
  • Other: 1.2% (10 residents)

What percentage of the population in Castlewood are U.S.-born citizens?

U.S.-born citizens represent 99% of the population in Castlewood.

How many housing units are there in Castlewood?

There are 307 housing units in Castlewood, reflecting a +7.7% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Castlewood and what is the average household size?

Castlewood has a total of 292 households, with an average of 3 people in each.

What is the median household income in Castlewood?

Castlewood has a median household income of $87,045, representing a -0.8% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Castlewood?

The employment rate is 98.2% in Castlewood, with a workforce of 450 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 65.3% (294 residents)
  • Blue-collar workers: 34.7% (156 residents)

Places of employment:
  • Self-employed: 5.6% (25 residents)
  • Private companies: 64.4% (290 residents)
  • Governmental workers: 22.7% (102 residents)
  • Not-for-profit companies: 7.3% (33 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025