South Dakota

Sully County

ZIP 57520

1,481 residents11 permits TTM$70,250 median HHI2 ZIP codesUpdated April 16, 2026
Investor first look

Median home value

$198,700

ACS 5-Year

Cap rate proxy

5.5%

FMR × 0.65 ÷ Home Value

Rent-to-income

15.6%

HUD FMR ÷ ACS HHI

Net migration

IRS SOI

Permits (TTM)

11

Census BPS

Climate risk

6.3

FEMA NRI (0–100)

ZIP 57520

Median home value

$198,700

Gross yield

5.7%

Cap rate

5.5%

Rent gap

3.7%

Affordability

P/I: 2.8R/I:

Section 8 detail

SAFMR: $948Rent: $913Gap: 3.8%
ZIP code breakdown2 ZIP codes

Numbers repeat across ZIPs in this county

ZIP-level home-value data isn't published for rural areas. Federal sources (Census ACS, HUD non-metro FMR) are available at the county level only, so home-value, cap-rate, and rent-gap numbers use the county estimate for every ZIP in the county.

ZIPMedian home valueRent (FMR 2BR)Gross yieldCap rateRent gap
57520$198,700county est.$9485.7%5.5%3.7%
57564$198,700county est.$9485.7%5.5%3.7%

Sort by any column. Click a ZIP for detail. Rent gap: green = HUD FMR above market rent.

Demographics

Owner-occupied

76.1%

Census ACS

Vacancy rate

31.3%

Census ACS

Bachelor's degree +

20.9%

Census ACS

Rent burdened

12.8%

Census ACS (>30% income)

Median age

51.4

Census ACS

Data sources
U.S. Census Bureau — American Community Survey 5-Year Estimates
U.S. Census Bureau — Building Permits Survey
U.S. Department of Housing and Urban Development — Fair Market Rents / Small Area Fair Market Rents (SAFMR)
Internal Revenue Service — Statistics of Income Migration Data
FEMA — National Risk Index
Last updated: April 16, 2026