HomeSouth DakotaGrant CountyTwin Brooks
Twin Brooks, South Dakota: commercial real estate data.
Twin Brooks is a Census town of 29 people across 0.41 square miles of land, in Grant County. 88.2 percent of occupied homes are owned.
Underlined figures are computed by MMCG Analytics, not published by the agency.
This is a small place, and the figures below carry wide margins.
The American Community Survey reaches Twin Brooks through a sample, not a count, and in a place this size that sample is thin. The population estimate here is 29 with a margin of error of plus or minus 16, which is 55.2 percent of the estimate itself. Every figure whose margin reaches 20 percent is printed with that margin beside it, so you can see the width of each one rather than having to assume it.
Nothing has been removed or adjusted. These are the published federal estimates, shown with the uncertainty the Census publishes alongside them.
Twin Brooks
What Twin Brooks is
- Census place typetown
- Land area0.41 sq mi
- Water area0 sq mi
- Population per square mile of land71 plus or minus 39
- County holding the largest share of its areaGrant County, 100.0 percent
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Twin Brooks
How many people live in Twin Brooks
- Population29 plus or minus 16
- Median age55.8 plus or minus 23.5
- Population under 182 plus or minus 10
- Share under 186.9 percent plus or minus 35.8
- Population 65 and over4 plus or minus 11
- Share 65 and over13.8 percent plus or minus 37.2
- Households17 plus or minus 11
- Family households8 plus or minus 6
- Share of households that are families47.1 percent plus or minus 17.8
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Twin Brooks
Income and work in Twin Brooks
- Per capita income$30,255 plus or minus $16,953
- Civilian labor force20 plus or minus 14
- Employed15 plus or minus 13
- Unemployed5 plus or minus 11
- Unemployment rate25.0 percent plus or minus 52.1
- Adults 25 and over22 plus or minus 13
- Adults 25 and over with a high school diploma or higher72.7 percent plus or minus 45.6
- Adults 25 and over with a bachelor degree or higher4.5 percent plus or minus 46.3
- Adults 25 and over with a graduate degree0.0 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Twin Brooks
Housing in Twin Brooks
- Housing units21 plus or minus 13
- Occupied units17 plus or minus 11
- Vacant units4 plus or minus 6
- Vacancy rate19.0 percent plus or minus 26.0
- Owner occupied15 plus or minus 11
- Renter occupied2 plus or minus 3
- Ownership rate88.2 percent plus or minus 30.4
- Median owner-occupied home value$75,800
- Single family units19 plus or minus 16
- Share single family90.5 percent plus or minus 48.9
- Units in buildings of two or more0
- Share in buildings of two or more0.0 percent
- Mobile homes2 plus or minus 3
- Median year structure built1966
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Twin Brooks
How Twin Brooks gets to work
- Workers 16 and over who commute15 plus or minus 13
- Commuting under 15 minutes6 plus or minus 12
- Share commuting under 15 minutes40.0 percent plus or minus 69.6
- Commuting 30 minutes or more3 plus or minus 11
- Share commuting 30 minutes or more20.0 percent plus or minus 68.7
- Drove alone100.0 percent
- Carpooled0.0 percent
- Public transport0.0 percent
- Walked0.0 percent
- Worked from home0.0 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Twin Brooks
Flood risk in Twin Brooks
- NFIP communityCity of Twin Brooks
- NFIP community number461208
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date(NSFHA)
The City of Twin Brooks participates in the National Flood Insurance Program as community 461208 and carries no Community Rating System class, so no CRS premium discount applies to it.
Federal Emergency Management Agency, NFIP Community Status Book (OpenFEMA), as of 2026-09-26.
Grant County, not Twin Brooks
Grant County context, not Twin Brooks figures
- Establishments in Grant County284
- Covered employment, Grant County3,854
- Average annual pay, Grant County$54,491
- Housing units permitted, Grant County22
Every figure in this section is published for Grant County as a whole and is not a measurement of Twin Brooks.
US Census Bureau, County Business Patterns, 2023. US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages. US Census Bureau, Building Permits Survey, 2024 annual.
Coverage
What this page does not hold.
Parcel detail, 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 →
Common questions
Twin Brooks questions, answered from the record.
How many people live in Twin Brooks, South Dakota?
29, in 17 households. Twin Brooks town covers 0.41 square miles of land, which is 71 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Twin Brooks in?
Grant County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
Is Twin Brooks in the National Flood Insurance Program?
Yes. Twin Brooks appears in the FEMA Community Status Book as Twin Brooks, city of, community 461208, with no Community Rating System class, so no CRS discount applies. Whether a specific parcel sits in a mapped special flood hazard area is an address level question the platform answers.
Are the county figures on this page Twin Brooks figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for Grant County as a whole and there is no place level equivalent. They appear in one clearly marked section as context and are never presented as measurements of Twin Brooks.
Is zoning published for Twin Brooks?
No. Nothing on this page presents parcel level zoning.
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