Custer County · South Dakota
ZIP code 57730
- Population
- 5,647
- Median income
- $81,911
- Median home
- $324,300
- Sales tax
- 4.2%
ZCTA residents
Household, past 12 months
Owner-occupied value
South Dakota state rate
Quick answer
ZIP 57730 sits in Custer County, South Dakota and is home to 5,647 people. Median household income is $81,911, the median home is worth $324,300 and median gross rent is $1,070. 80.7% of households own their home, and purchases are taxed at 4.2% (South Dakota state rate).
- County
- Custer County
- State
- South Dakota (SD)
- Area codes
- Not published
- Metro area
- Outside covered metros
FIPS 46033
375 ZIPs covered
No NANPA match for this ZIP
Rate jurisdiction used for tax
The numbers for 57730
American Community Survey 2019-2023 ACS 5-year estimates for this ZCTA.
- Population
- 5,647ZIP 57730 residents
- Median household income
- $81,911Past 12 months, inflation adjusted
- Median home value
- $324,300Owner-occupied units
- Median gross rent
- $1,070Rent plus utilities, monthly
- Median age
- 57.6 yrsAll residents
- Homeownership rate
- 80.7%Owner-occupied households
Sales tax in 57730
What a purchase inside this ZIP costs at checkout.
South Dakota levies 4.2% statewide, and counties, cities and special districts inside this ZIP can add their own local rate on top. Check the county page for the local component before you quote a price.
Affordability in this ZIP
Derived from the Census medians above — indicative, not an offer.
A rent burden above 30% is the federal threshold for cost-burdened households, and a price-to-income multiple above 4× is generally considered a stretched housing market. The mortgage figure is principal and interest only — taxes, insurance and HOA dues are extra.
How 57730 compares
ZIP 57730 against the median ZIP in Custer County and across South Dakota.
| Measure | ZIP 57730 | County median | State median | vs state |
|---|---|---|---|---|
| Median household income | $81,911 | $65,331 | $71,607 | +14% |
| Median home value | $324,300 | $337,550 | $162,500 | +100% |
| Median gross rent | $1,070 | $1,272 | $740 | +45% |
| Population | 5,647 | 1,289 | 605 | +833% |
Medians are computed across the 4 ZIP areas in Custer County and the 375 ZIP areas in South Dakota.
Statewide rank
Where this ZIP places among all 375 South Dakota ZIP areas.
- Income
- #99
- Home value
- #18
- Population
- #31
richer than 71% of 347 state ZIPs
above 94% of 317 state ZIPs
larger than 92% of 375 state ZIPs
Comparable ZIP codes
South Dakota ZIP areas with almost the same household income.
Nearby ZIP codes
Other ZIP codes filed under Custer County.
ZIP 57730 questions
Common questions about this ZIP code.
- Where is ZIP code 57730?
- ZIP 57730 lies mostly in Custer County, South Dakota. County assignment follows the largest share of land area, so a ZIP straddling a county line is filed under its dominant county.
- What sales tax do I pay in 57730?
- South Dakota charges 4.2% statewide, plus any county, city or district rate that applies locally.
- Is 57730 expensive to live in?
- Median rent runs $1,070 a month, about 16% of median household income, and the median home is worth $324,300 — +100% against the typical South Dakota ZIP.
- Is a ZCTA the same as a postal ZIP code?
- Not exactly. The Census builds ZIP Code Tabulation Areas from the ZIP codes of addresses inside each census block, so a ZCTA can differ slightly from the USPS delivery route of the same number, and PO-box-only ZIPs have no ZCTA at all.
Keep going
Related pages for this area.
Sources & transparency
- US Census Bureau, ACS 2019-2023 5-year estimates — 2019-2023 ACS 5-year — population, income, housing
- Census 2020 ZCTA-to-county relationship file — County assignment by largest land-area overlap
- South Dakota Department of Revenue — Sales tax rates and local add-ons
Last reviewed December 2024. Figures are published for reference and can change; verify with the source agency before filing or contracting. How we build and check this data.