Market insights · South Dakota
Day County, SD: growth, migration and housing
Day County has 5,484 residents, up 0.8% since 2020 (+0.7% in the last year). In 2022–2023, 108 households moved in and 121 moved out (-13 net), bringing in a net $0.5M of income. Median household income is $66,033, the median home $173,600 and median rent $660 a month.
In South Dakota: 36th of 66 counties for 5-year population growth · 38th of 62 counties for net in-migration (per resident) · 47th of 66 counties for median household income · 29th of 66 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Day County, 2022–2023 (IRS).
The IRS publishes no county-level flows for Day County (it suppresses flows of fewer than 20 households).
Where leavers went
Top counties by households leaving Day County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Brown County, SD | 22 | $1.2M |
BizyFi in Day County
No companies in the BizyFi directory are based here yet. Search them on the company map (company names with a free account), or browse South Dakota companies.
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Sources: U.S. Census Bureau population estimates (vintage 2025), American Community Survey 5-year (2024), and IRS Statistics of Income county-to-county migration data (2022–2023). Migration counts are tax returns (roughly households) moving between U.S. counties; the IRS suppresses very small flows. Growth rates, per-1,000 figures, rent share and state ranks are BizyFi calculations. Data updated 2026-10-17. This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.