Castlewood, SD · standard
ZIP Code 57223
Hamlin County, South Dakota - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.
- 1,356
- 4/sq mi Low-density area
- $92,424
- Median income Above-median income area
- $236,600
- Median home value Near-median home value
- 28.5%
- Bachelor's or higher Near-average bachelor's attainment
National ZIP placement
Castlewood pairs an upper-quartile household income with above-median home values, in a rural, homeowner-dominated area.
- Top 25%
- household income, US ZIPs
- Top 46%
- home value, US ZIPs
- 4
- people per sq mi
- 88%
- owner-occupied homes
Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 57223 against every reporting US ZIP.
ZIP code 57223 is a sparsely populated ZIP (a standard USPS delivery area) in Castlewood, Hamlin County, South Dakota, home to just 1,356 residents across 330.7 square miles, a density of 4 people per square mile, in the Chicago time zone.
ZIP 57223 lands in the middle-income range, with a median household income of $92,424 (21% above the average South Dakota ZIP), while per-capita income is $39,865. Both reported hardship measures are comparatively low in absolute terms: poverty is 3.4% and unemployment is 1.0%. Housing is both higher-cost and owner-heavy: median home value is $236,600 (23% above the average South Dakota ZIP), while 87.6% of occupied homes are owner-occupied and median rent is $1,133.
Educational attainment sits below the national norm: 28.5% of adults hold a bachelor's degree or higher, the median age is 34.3, and the average commute is -. The page also surfaces 1 ZIP codes within roughly 10 miles and 5 more in Hamlin County, so 57223 can be compared with both its immediate and county-level context.
Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →
Top industries in ZIP 57223
Top 5 sectors by establishment count in Castlewood, SD
Which industries have the most business establishments in ZIP 57223.
- Construction
Construction
14 establishments
- Retail trade
Retail trade
6 establishments
- Finance and insurance 5
Finance and insurance
5 establishments
- Administrative and support and waste management and remediation services 4
Administrative and support and waste management and remediation services
4 establishments
- Professional, scientific, and technical services 3
Professional, scientific, and technical services
3 establishments
What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.
Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 57223, Castlewood, SD · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.
Quick Facts
1,356
Population
330.7
Area (sq mi)
4
People / sq mi
Chicago
Time Zone
standard
ZIP Type
Who lives in ZIP 57223?
34.3
Median Age
52.1%
Male
47.9%
Female
0.4%
Foreign-Born
Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
How much do residents earn?
$92,424
Median Household Income
+21% vs state ZIP avg
$39,865
Per Capita Income
3.4%
Poverty Rate
1.0%
Unemployment Rate
How ZIP 57223 ranks among South Dakota ZIPs
Castlewood, SD household income vs. every South Dakota ZIP code
Median household income among 337 reporting South Dakota ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$92,424 Top 20% higher than 80% of 337 South Dakota ZIPs
Each bar is a $20K-wide band; taller bars hold more South Dakota ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.
Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What is the education profile here?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
575housing units
575
Total Housing Units
510
Occupied Units
65
Vacant Units
2.80
Avg Household Size
Occupancy Type
$236,600
Median Home Value
+23% vs state ZIP avg
$1,133
Median Rent
1976
Median Year Built
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What businesses operate in this ZIP?
Census Bureau data shows 43 business establishments in ZIP 57223, employing approximately 173 people with a combined annual payroll of $8,052,000.
43
Businesses
173
Employees
$8.1M
Annual Payroll
6
Industry Sectors
| Industry | Establishments | % of Total |
|---|---|---|
| Construction | 14 | 32.6% |
| Retail trade | 6 | 13.9% |
| Finance and insurance | 5 | 11.6% |
| Administrative and support and waste management and remediation services | 4 | 9.3% |
| Professional, scientific, and technical services | 3 | 7.0% |
| Other services (except public administration) | 3 | 7.0% |
Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.
Nearby ZIP Codes
Want a side-by-side? Compare 57223 vs 57234 →
| ZIP Code | City | Population | Distance |
|---|---|---|---|
| 57234 | Estelline, SD | 1,274 | 9.6 mi |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 57223, both outside SD so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,356 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Hamlin County
Related Areas
Frequently Asked Questions
What county is ZIP code 57223 in?
ZIP code 57223 (Castlewood) is located in Hamlin County, South Dakota. Hamlin County contains multiple ZIP codes, see the full list at /counties/hamlin-sd.
What is the population of ZIP code 57223?
ZIP code 57223 in Castlewood, SD has a population of 1,356 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 57223?
The median household income in ZIP 57223 is $92,424, which is 21% above the national average of $76,288.
What is the average home value in ZIP 57223?
The median home value in ZIP 57223 is $236,600, which is 15% below the national average of $278,155.
What is the demographic makeup of ZIP 57223?
The largest racial group in ZIP 57223 is White at 94.3%. Hispanic or Latino residents make up 0.3% of the population.
How many businesses are in ZIP code 57223?
ZIP code 57223 has 43 business establishments employing approximately 173 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 57223?
The top industries by establishment count in ZIP 57223 are: Construction (14), Retail trade (6), Finance and insurance (5). There are 6 industry sectors represented in total.
What is the education level in ZIP code 57223?
In ZIP code 57223, 63.1% of residents aged 25+ have a high school diploma or higher, and 28.5% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 57223?
In ZIP code 57223, approximately 87.6% of occupied housing units are owner-occupied and 12.4% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 57223?
The poverty rate in ZIP code 57223 is 3.4% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.
Related
Take this with you
What to do with ZIP 57223's numbers, next.
- See how ZIP 57223 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Castlewood, SD ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.