Market insights · South Dakota
Clay County, SD: growth, migration and housing
Clay County has 15,031 residents, up 0.2% since 2020 (-1.1% in the last year). In 2022–2023, 550 households moved in and 599 moved out (-49 net), while a net $4.2M of income left. Median household income is $56,850, the median home $232,300 and median rent $770 a month.
In South Dakota: 40th of 66 counties for 5-year population growth · 42nd of 62 counties for net in-migration (per resident) · 57th of 66 counties for median household income · 13th of 66 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Clay County, 2022–2023 (IRS).
| From | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Minnehaha County, SD | 50 | $2.0M |
| Yankton County, SD | 34 | $1.5M |
| Union County, SD | 31 | $2.5M |
| Lincoln County, SD | 20 | $1.7M |
Where leavers went
Top counties by households leaving Clay County, 2022–2023 (IRS).
| To | Households (tax returns) | Their income (AGI) |
|---|---|---|
| Minnehaha County, SD | 84 | $4.7M |
| Yankton County, SD | 53 | $2.4M |
| Lincoln County, SD | 39 | $1.8M |
| Woodbury County, IA | 30 | $1.2M |
| Union County, SD | 27 | $1.5M |
BizyFi in Clay County
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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.