HomeSouth DakotaSully County
Sully County, South Dakota: commercial real estate data.
Sully County, South Dakota had an estimated 1,468 residents on July 1, 2024, up 1.5 percent since the 2020 census base of 1,447, across 1,007 square miles. County output reached $108.4 m in 2024, 67 establishments operate here.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Sully County
How many people live in Sully County
- Population, American Community Survey 2020-20241,526
- Households637
- Average household size2.40
- Median household income$72,578
- Median age46.9
- Median gross rent$842 per month
- Median owner-occupied home value$205,400
- Home value to household income2.8 times
- Annual rent as a share of median income13.9 percent
- Adults 25 and over with a bachelor degree or higher24.1 percent
- Adults 25 and over with a graduate degree5.5 percent
- Adults 25 and over1,089
- Population under 18336
- Share under 1822.0 percent
- Population 65 and over353
- Share 65 and over23.1 percent
- Working age population, 18 to 64837
- Civilian labor force868
- Unemployment rate0.0 percent
- Labor force participation, adults 18 and over72.9 percent
- Rank by population among South Dakota counties63rd of 66
- Rank by population among US county-equivalents, Puerto Rico included3156th of 3,222
Sully County is the 63rd largest of 66 South Dakota counties by population. A median home costs 2.8 times median household income, which is affordable by national standards. Residents 65 and over outnumber those under 18, at 23.1 percent against 22.0 percent, which points demand at health care, services and single story product rather than schools.
US Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 5-year.
Sully County
Is Sully County's population growing?
- Population, July 1, 20241,468
- Census 2020 base population1,447
- Population change since the 2020 census base1.45 percent
- Population change, 2023 to 2024-17
- Births, 202412
- Deaths, 202414
- Natural change, 2024-2
- Net domestic migration, 2024-19
- Net international migration, 20245
- Total net migration, 2024-14
- Cumulative net domestic migration, 2021 to 20245
- Rank by growth among US county-equivalents1353rd of 3,144
The county has grown 1.45 percent since the 2020 census base. The population fell in 2024 from both sources: deaths exceeded births and more people left than moved in.
US Census Bureau, Population Estimates Program, Vintage 2024, Vintage 2024, estimates 2020 to 2024.
Sully County
Where are people moving to Sully County from?
- Tax returns filed by households arriving30
- People arriving, from those returns47
- Tax returns filed by households leaving26
- Net household movement4
- Adjusted gross income arriving$2.2 m
- Net adjusted gross income movement$-84,000
- Average income of an arriving household$72,100
- Average income of a leaving household$86,423
| Origin | Households | People | Adjusted gross income |
|---|
Households arriving report $14,323 less average income than households leaving, which drains spending power even where headcount holds up.
US Internal Revenue Service, Statistics of Income county migration flows, 2021 to 2022 filing years.
Sully County
What is the Sully County economy?
- County GDP, 2024$108.4 m
- County GDP, 2023$171.7 m
- GDP change, 2023 to 2024-36.8 percent
- GDP change over five years-14.5 percent
- Rank by GDP among the South Dakota areas BEA publishes59th of 66
- Rank by GDP among the US county areas BEA publishes3042nd of 3,127
- GDP per resident$71,067
Output grew -36.8 percent in the latest year and -14.5 percent over five, which is the trend line a lender will read behind any single year figure.
US Bureau of Economic Analysis, Regional, table CAGDP2, CAGDP2, through 2024.
Sully County
Employment by industry in Sully County
- Covered employment, annual average679
- Establishments reporting97
- Average annual pay$55,514
- Average weekly wage$1,068
- Agriculture, forestry, fishing and hunting, employment173
- Agriculture, forestry, fishing and hunting, average annual pay$69,254
- Retail trade, employment117
- Retail trade, average annual pay$32,653
- Accommodation and food services, employment103
- Accommodation and food services, average annual pay$46,640
- Wholesale trade, employment48
- Wholesale trade, average annual pay$83,574
| Sector | Employment | Establishments | Average annual pay |
|---|---|---|---|
| Agriculture, forestry, fishing and hunting | 173 | 29 | $69,254 |
| Retail trade | 117 | 12 | $32,653 |
| Accommodation and food services | 103 | 9 | $46,640 |
| Wholesale trade | 48 | 6 | $83,574 |
Agriculture, forestry, fishing and hunting is the largest private sector at 173 jobs, 25.5 percent of covered employment.
US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages.
Sully County
How many businesses are in Sully County?
- Establishments, all industries67
- Employment at those establishments304
- Annual payroll$18.0 m
- Establishments per 1,000 residents43.9
These are counts of establishments physically operating in the county, not listings, so they are the supply side a feasibility study measures demand against. County Business Patterns counts private establishments with paid employees in March 2023, while the Quarterly Census of Employment and Wages above counts every unemployment-insured employer, public ones included, as a 2024 annual average, so the two establishment and employment counts differ.
US Census Bureau, County Business Patterns, 2023.
Sully County
Building permits in Sully County
- Housing units authorized by permit, 202417
- Declared construction value permitted$4.7 m
- Single family units authorized17
- Multifamily units authorized0
- Multifamily share of units0.0 percent
- Average declared value per unit$273,862
- Units authorized per 1,000 households26.7
Single-family homes are 100.0 percent of units authorized, so the pipeline is predominantly single-family.
US Census Bureau, Building Permits Survey, 2024 annual.
Sully County
How large is Sully County?
- Land area1,007 sq mi
- Rank by land area among South Dakota counties30th of 66
- Width, east to west51.3 mi
- Height, north to south24.2 mi
- Geographies sharing a boundary5
- Residents per square mile of land2
- Establishments per square mile0.07
US Census Bureau county boundary geometry, TIGER, adjacency computed from shared boundary vertices, TIGER county boundaries. US Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 5-year. US Census Bureau, County Business Patterns, 2023.
Sully County
Flood risk in Sully County
- Participation of the county's own NFIP community Sully County, unincorporated areasParticipating, community 460288
- Communities in the county in the NFIP Community Status Book2
- Of those, participating in the NFIP2
- NFIP participation rate100.0 percent
- Communities carrying a CRS class0
- Radon levels in Sully County, EPA zone predicted average indoor radon screening level greater than 4 pCi/LZone 1
The county's own community in the status book, unincorporated Sully County (community 460288), participates in the National Flood Insurance Program and carries no Community Rating System class, so no CRS premium discount applies there. The EPA places Sully County in radon zone 1, a predicted average indoor radon screening level greater than 4 pCi/L. The zone is a screening prediction for the county and does not substitute for a test at an address. 100.0 percent of the county's listed communities participate in the National Flood Insurance Program, per Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26. US EPA, Map of Radon Zones, county spreadsheet, 2024-05 publication, EPA 402/A-16/001.
Coverage
What this page does not hold.
Traffic counts, zoning and the flood zone at an address are not on this page; they resolve at the address in the platform. How this page was built →
Feasibility studies
When a Sully County site needs a document a lender will accept.
The same data layer behind this page is the one the studies are written from. A study for a Sully County site starts with the figures you are reading, carrying the same source and period into the credit file.
- Population, American Community Survey 2020-20241,526
- Households637
- Average household size2.40
- Median household income$72,578
- Median age46.9
Common questions
Sully County questions, answered from the record.
How many people live in Sully County, South Dakota?
The Census Bureau estimates 1,468 residents on July 1, 2024 (US Census Bureau, Population Estimates Program, Vintage 2024). The American Community Survey 2020-2024 five-year estimate is 1,526, in 637 households, ranking 63rd of 66 South Dakota counties. Source: US Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 5-year.
Is Sully County's population growing?
The population has grown 1.45 percent since the 2020 census base of 1,447, to 1,468 on July 1, 2024. In 2024 there were 12 births against 14 deaths, with net migration of -14. Source: US Census Bureau, Population Estimates Program, Vintage 2024, Vintage 2024, estimates 2020 to 2024.
What is the median household income in Sully County?
$72,578. The median owner-occupied home is valued at $205,400, which is 2.8 times income, and median gross rent is $842 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 5-year.
How many businesses are in Sully County?
67 establishments, employing 304 people with an annual payroll of $18.0 m. These are establishments physically operating in the county, not listings. Source: US Census Bureau, County Business Patterns, 2023.
What is employment by industry in Sully County?
Agriculture, forestry, fishing and hunting is the largest private sector at 173 jobs, 25.5 percent of covered employment. Covered employment averages 679 jobs at an average annual pay of $55,514, or $1,068 a week. Source: US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages.
How many building permits were issued in Sully County?
17 housing units were authorized by permit in 2024, with a declared construction value of $4.7 m. Multifamily was 0.0 percent of units. Source: US Census Bureau, Building Permits Survey, 2024 annual.
What is the radon zone for Sully County?
Zone 1, a predicted average indoor radon screening level greater than 4 pCi/L. Source: US EPA, Map of Radon Zones, county spreadsheet, 2024-05 publication, EPA 402/A-16/001.
Are traffic counts available for Sully County on this page?
No. Annual average daily traffic resolves in the platform rather than in this dataset, so no AADT figure is printed here. It is a gap we know about rather than a figure we estimated.
Is zoning published for Sully County?
No. Nothing on this page presents parcel level zoning, and where a statutory framework applies it is marked as the statewide frame, to be confirmed locally.
Sully County
Cities and places in Sully.
3 Census places lie wholly or partly in Sully County. All 3 carry enough published place level data for a page of their own and are linked.
| Place | Type | Population | SBA 7(a) approvals, projects in this county | Lies in |
|---|---|---|---|---|
| Onida | city | 644 | None recorded | Wholly in this county |
| Agar | town | 81 | None recorded | Wholly in this county |
| Cow Creek | CDP | 69 | None recorded | Wholly in this county |