Market insights · South Dakota
Sully County, SD: growth, migration and housing
Sully County has 1,479 residents, up 1.9% since 2020 (+0.4% in the last year). In 2022–2023, 32 households moved in and 25 moved out (+7 net), bringing in a net $0.4M of income. Median household income is $72,578, the median home $205,400 and median rent $842 a month.
In South Dakota: 27th of 66 counties for 5-year population growth · 5th of 62 counties for net in-migration (per resident) · 34th of 66 counties for median household income · 23rd of 66 counties for median home value.
Where new residents came from
Top counties by households (tax returns) moving to Sully County, 2022–2023 (IRS).
The IRS publishes no county-level flows for Sully County (it suppresses flows of fewer than 20 households).
Where leavers went
Top counties by households leaving Sully County, 2022–2023 (IRS).
The IRS publishes no county-level flows for Sully County (it suppresses flows of fewer than 20 households).
BizyFi in Sully 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.