57223 ZIP Code — Castlewood, SD
Hamlin County, South Dakota
ZIP code 57223 is located in Castlewood, South Dakota, within Hamlin County. It covers approximately 124.64 square miles and serves a population of 1,317 residents. This is a standard ZIP code in the Central (CT) timezone, served by area code 605.
About ZIP code 57223
The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $205,600. Owner-occupancy is high at 86%, well above the national average.
Median household income is $83,295. The poverty rate of 3% is below the national average.
The dominant occupation class is management, business, and professional, with education and healthcare as the leading industry. The average commute of 20 minutes is near the national average.
Educational attainment is near the national average, with 23% of residents holding a bachelor's degree or higher.
1,317
population
124.64
sq mi land
Standard
ZIP type
Central (CT)
timezone
57223 ZIP code map
Cities in ZIP code 57223
Below are the cities the US Postal Service accepts for ZIP code 57223. Using any city not on this list may result in mail delivery delays.
| City | Status |
|---|---|
| Castlewood | Acceptable |
| Castlewood | Preferred |
Nearby ZIP codes
57234 Estelline (9.4 mi)
57241 Hayti (11.5 mi)
57226 Clear Lake (13.5 mi)
57238 Goodwin (14 mi)
57248 Lake Norden (14.2 mi)
57242 Hazel (15.6 mi)
57218 Brandt (16.9 mi)
57201 Watertown (17 mi)
57268 Toronto (17.5 mi)
57220 Bruce (18.7 mi)
Demographics
updated 05/2026
| Population | |
|---|---|
| Total population | 1,317 |
| Population density | 11 / sq mi |
| State FIPS | 46 |
| County FIPS | 057 |
| Geography | |
|---|---|
| Land area | 124.64 sq mi |
| Water area | 3.18 sq mi |
| Latitude | 44.7172 |
| Longitude | -97.0060 |
| Timezone | Central (CT) |
| Area code | 605 |
Total population by age
Gender
Race & ethnicity
Economics
updated 05/2026
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 29.0% | 30.6% | 41.7% |
| $50k – $100k | 48.1% | 46.3% | 33.8% |
| $100k – $200k | 18.9% | 20.9% | 20.1% |
| Over $200k | 4.0% | 2.3% | 4.4% |
Demographics & statistics
1,317
Population
11
People per sq mi
36.1
Median age
$83,295
Median household income
$34,798
Per capita income
$205,600
Median home value
$885
Median monthly rent
86.2%
Home ownership
3.2%
Poverty rate
0.9%
Unemployment
469
Housing units
23.0%
Bachelor's or higher
Age distribution
Male
Female
52
Under 5
50
77
5–9
74
49
10–14
47
41
15–19
39
27
20–24
26
83
25–34
79
76
35–44
73
73
45–54
70
52
55–59
49
46
60–64
44
59
65–74
57
23
75–84
22
15
85+
14
← Male
Female →
Age summary
| Group | Count | % |
|---|---|---|
| Under 18 | 410 | 31.1% |
| 18 and over | 907 | 68.9% |
| 65 and over | 190 | 14.4% |
| Median age | 36.1 years | |
Race & ethnicity
White
95.4%
Two or more races
2.6%
Hispanic or Latino
1%
Other race
0.6%
Asian
0.3%
Black or African American
0.2%
| Group | Count | % |
|---|---|---|
| White | 1,269 | 95.4% |
| Two or more races | 34 | 2.6% |
| Hispanic or Latino | 13 | 1% |
| Other race | 8 | 0.6% |
| Asian | 4 | 0.3% |
| Black or African American | 2 | 0.2% |
Household income
| Income range | This ZIP | County avg | State avg |
|---|---|---|---|
| Under $50k | 29.0% | 30.6% | 41.7% |
| $50k – $100k | 48.1% | 46.3% | 33.8% |
| $100k – $200k | 18.9% | 20.9% | 20.1% |
| Over $200k | 4.0% | 2.3% | 4.4% |
Under $10k
1.0%
$10k–$15k
3.0%
$15k–$25k
7.1%
$25k–$35k
6.1%
$35k–$50k
10.3%
$50k–$75k
15.2%
$75k–$100k
22.7%
$100k–$150k
22.9%
$150k–$200k
6.1%
$200k+
5.7%
| Range | % of households |
|---|---|
| Under $10k | 1.0% |
| $10k–$15k | 3.0% |
| $15k–$25k | 7.1% |
| $25k–$35k | 6.1% |
| $35k–$50k | 10.3% |
| $50k–$75k | 15.2% |
| $75k–$100k | 22.7% |
| $100k–$150k | 22.9% |
| $150k–$200k | 6.1% |
| $200k+ | 5.7% |
| Median income | $83,295 |
Housing
Home values
Under $50k
3.8%
$50k–$100k
9.4%
$100k–$150k
11.3%
$150k–$200k
23.9%
$200k–$300k
28.2%
$300k–$500k
20.4%
$500k–$1M
3.1%
Housing overview
| Metric | Value |
|---|---|
| Median home value | $205,600 |
| Median rent / month | $885 |
| Owner occupied | 86.2% |
| Renter occupied | 13.8% |
| Vacant | 8.0% |
| Single-family detached | 89.6% |
| Large apartment buildings | 0.6% |
| Mobile homes | 3.5% |
| Median rooms | 6.9 |
| Avg household size (owned) | 2.78 |
Year built
| Era | % |
|---|---|
| 2020 or later | 0.0% |
| 2010–2019 | 11.0% |
| 2000–2009 | 11.5% |
| 1990–1999 | 8.9% |
| 1980–1989 | 7.1% |
| 1970–1979 | 19.0% |
| 1960–1969 | 4.3% |
| 1950–1959 | 6.7% |
| 1940–1949 | 2.6% |
| 1939 or earlier | 28.9% |
Bedrooms
| Size | % of units |
|---|---|
| No bedroom (studio) | 2.0% |
| 1 bedroom | 2.8% |
| 2 bedrooms | 20.5% |
| 3 bedrooms | 35.0% |
| 4 bedrooms | 28.3% |
| 5+ bedrooms | 11.4% |
Vehicles per household
| Vehicles | % of households |
|---|---|
| No vehicle | 1.0% |
| 1 vehicle | 14.6% |
| 2 vehicles | 37.4% |
| 3 or more | 47.0% |
Heating fuel
| Fuel type | % |
|---|---|
| Utility gas | 41.7% |
| Electricity | 34.6% |
| Propane / LP gas | 20.2% |
| Fuel oil | 1.6% |
| Wood | 0.6% |
| No fuel used | 0.6% |
Households & families
| Household type | Count | % |
|---|---|---|
| Married-couple family | 312 | 63.2% |
| Cohabiting couple | 11 | 2.2% |
| Male householder, no spouse | 87 | 17.6% |
| Female householder, no spouse | 84 | 17.0% |
| Households with children under 18 | 172 | 34.8% |
| Households with seniors (65+) | 126 | 25.5% |
| Average household size | 2.67 | |
Marital status
| Status | Male | Female |
|---|---|---|
| Never married | 27.1% | 15.1% |
| Married | 63.4% | 66.3% |
| Separated | 1.5% | 0.0% |
| Widowed | 0.0% | 4.7% |
| Divorced | 7.9% | 14.0% |
Education
Less than 9th grade
1.0%
Some HS, no diploma
1.1%
HS graduate
38.0%
Some college, no degree
21.0%
Associate's degree
16.0%
Bachelor's degree
18.6%
Graduate / professional
4.4%
| Metric | % |
|---|---|
| HS diploma or higher | 98.0% |
| Bachelor's or higher | 23.0% |
School enrollment (ages 3–17)
| Type | Count | % |
|---|---|---|
| Nursery / preschool | 29 | 8.7% |
| Kindergarten | 26 | 7.8% |
| Elementary school | 168 | 50.5% |
| High school | 72 | 21.6% |
| College / grad school | 38 | 11.4% |
Employment
Industry of employment
Education & healthcare
21.6%
Manufacturing
16.1%
Agriculture & mining
11.1%
Other services
9.6%
Retail trade
7.5%
Professional & management
7.4%
Transportation & utilities
6.6%
Wholesale trade
5.9%
Construction
5.2%
Finance & real estate
3.3%
Public administration
2.6%
Arts, food & hospitality
2.3%
Information
1.0%
Occupation
| Category | % |
|---|---|
| Management, business & arts | 38.7% |
| Service | 11.2% |
| Sales & office | 18.9% |
| Natural resources & construction | 12.6% |
| Production & transportation | 18.7% |
Employment type
| Type | % |
|---|---|
| Private sector | 70.5% |
| Government | 14.2% |
| Self-employed | 15.3% |
| Unpaid family workers | 0.0% |
Commute
| Method | % |
|---|---|
| Drive alone | 77.1% |
| Carpool | 12.4% |
| Public transit | 0.0% |
| Walk | 2.5% |
| Work from home | 7.9% |
| Other means | 0.0% |
| Avg commute (minutes) | 19.8 |
Poverty
All people
3.2%
Under 18 years
2.2%
18 and over
3.6%
Married-couple families
0.6%
Female-led households
3.7%
Income support
| Source | % of households |
|---|---|
| Social Security | 23.5% |
| Retirement income | 15.4% |
| Supplemental Security | 2.6% |
| Cash public assistance | 0.4% |
| Food stamps / SNAP | 1.4% |
Health indicators
| Condition | % |
|---|---|
| Obesity | 32.9% |
| High blood pressure | 28.8% |
| High cholesterol | 30.8% |
| Diabetes | 8.3% |
| Heart disease | 6.1% |
| Stroke | 2.8% |
| Asthma | 8.5% |
| Arthritis | 22.4% |
| Kidney disease | 2.6% |
| Pulmonary disease | 5.5% |
| Cancer | 7.0% |
| Behavior / access | % |
|---|---|
| Smoking | 17.5% |
| Binge drinking | 20.2% |
| No physical activity | 21.1% |
| Less than 7 hrs sleep | 27.3% |
| Depression | 15.1% |
| Fair or poor health | 10.3% |
| Poor mental health | 10.5% |
| Poor physical health | 8.2% |
| No health insurance | 11.8% |
| Visited doctor (checkup) | 71.9% |
| Visited dentist | 68.6% |
| Cholesterol screening | 89.1% |
| Teeth loss | 12.4% |
Veterans & disability
| Veterans | Count | % |
|---|---|---|
| Civilian veterans | 70 | 7.7% |
| Disability | % |
|---|---|
| Any disability | 9.1% |
| Under 18 | 3.2% |
| 18–64 years | 4.5% |
| 65 and over | 38.9% |
Health insurance coverage
| Type | % |
|---|---|
| Private insurance | 78.3% |
| Public insurance | 21.3% |
| No insurance | 9.7% |
| Uninsured under 19 | 14.8% |
Language & origin
Language spoken at home (age 5+)
| Language | Count | % |
|---|---|---|
| English only | 1,215 | 92.3% |
| Spanish | 5 | 0.4% |
| Other Indo-European | 5 | 0.4% |
| Asian & Pacific Islander | 0 | 0.0% |
| Other languages | 0 | 0.0% |
Place of birth & citizenship
| Origin | Count | % |
|---|---|---|
| Native born (US) | 1,308 | 99.3% |
| Born in same state | 1,300 | 98.7% |
| Born in different state | 982 | 74.6% |
| Foreign born | 8 | 0.6% |
| Naturalized citizen | 9 | 0.7% |
| Not a US citizen | 1 | 11.1% |
Ancestry
| Ancestry | Count | % |
|---|---|---|
| English | 153 | 11.6% |
| Polish | 146 | 11.1% |
| Arab | 81 | 6.2% |
| Italian | 71 | 5.4% |
| Ancestry | Count | % |
|---|---|---|
| French | 48 | 3.6% |
| Dutch | 27 | 2.1% |
| German | 3 | 0.2% |
Technology access
| Metric | % of households |
|---|---|
| Computer access | 37.5% |
| Internet access | 92.7% |
Source: U.S. Census Bureau, American Community Survey 2025 estimates.
Frequently asked questions about ZIP code 57223
What city is ZIP code 57223 in?
ZIP code 57223 is primarily assigned to Castlewood, South Dakota.
What county is ZIP code 57223 in?
ZIP code 57223 falls within Hamlin County, South Dakota.
Is ZIP code 57223 family-oriented?
31% of residents in ZIP code 57223 are under 18, reflecting a younger, family-oriented community.
Is ZIP code 57223 mostly owner-occupied?
86% of occupied units in ZIP code 57223 are owner-occupied, well above the national average.
What is the population of ZIP code 57223?
ZIP code 57223 has an estimated population of 1,317 residents, with a density of 11 people per square mile.
What is the typical home value in ZIP code 57223?
The median home value in ZIP code 57223 is $205,600.
What timezone is ZIP code 57223 in?
ZIP code 57223 observes the CST timezone.