HomeIllinoisGrundy CountySouth Wilmington
South Wilmington, Illinois: commercial real estate data.
South Wilmington is a Census village of 600 people across 0.49 square miles of land, in Grundy County. Median household income is $86,750, 90.0 percent of occupied homes are owned, and the SBA record carries 1 7(a) approvals to borrowers here worth $229,200 since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
South Wilmington
What South Wilmington is
- Census place typevillage
- Land area0.49 sq mi
- Water area0 sq mi
- Population per square mile of land1,220 plus or minus 289
- County holding the largest share of its areaGrundy 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.
South Wilmington
How many people live in South Wilmington
- Population600 plus or minus 142
- Median age43.0 plus or minus 14.1
- Population under 18121 plus or minus 44
- Share under 1820.2 percent plus or minus 5.6
- Population 65 and over111 plus or minus 24
- Share 65 and over18.5 percent plus or minus 6.0
- Households269
- Family households168 plus or minus 37
- Share of households that are families62.5 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South Wilmington
Income and work in South Wilmington
- Median household income$86,750
- Per capita income$45,772
- Civilian labor force292
- Employed280 plus or minus 57
- Unemployed12 plus or minus 9
- Unemployment rate4.1 percent plus or minus 3.0
- Adults 25 and over452
- Adults 25 and over with a high school diploma or higher91.2 percent plus or minus 22.1
- Adults 25 and over with a bachelor degree or higher13.1 percent plus or minus 4.7
- Adults 25 and over with a graduate degree4.0 percent plus or minus 3.4
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South Wilmington
Housing in South Wilmington
- Housing units283
- Occupied units269
- Vacant units14 plus or minus 14
- Vacancy rate4.9 percent plus or minus 4.9
- Owner occupied242
- Renter occupied27 plus or minus 21
- Ownership rate90.0 percent
- Median owner-occupied home value$174,400
- Median gross rent, monthly$1,277 plus or minus $287
- Annual rent as a share of median income17.7 percent plus or minus 4.5
- Single family units268
- Share single family94.7 percent
- Units in buildings of two or more14 plus or minus 23
- Share in buildings of two or more4.9 percent plus or minus 8.1
- Mobile homes0
- Median year structure built1959
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South Wilmington
How South Wilmington gets to work
- Workers 16 and over who commute256
- Commuting under 15 minutes32 plus or minus 14
- Share commuting under 15 minutes12.5 percent plus or minus 4.9
- Commuting 30 minutes or more152 plus or minus 38
- Share commuting 30 minutes or more59.4 percent
- Drove alone94.0 percent plus or minus 25.8
- Carpooled1.5 percent plus or minus 1.5
- Public transport0.0 percent
- Walked0.0 percent
- Worked from home3.8 percent plus or minus 3.3
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
South Wilmington
SBA loans in South Wilmington (7(a))
- Approvals1
- Gross approval$229,200
- Average approval$229,200
- Median approval$229,200
- Largest approval$229,200
- Jobs supported6
- Jobs per approval6.0
- Loans with a final outcome0
- Paid in full0
- Charged off0
- Median term120 months
- Share on real estate terms of 20 years or more0.0 percent
- Share to franchises0.0 percent
- Distinct lenders1
- Distinct industries by NAICS1
Counted by borrower city: approvals to borrowers whose address is in South Wilmington, in any county, FY2020 to FY2026. Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
South Wilmington
Flood risk in South Wilmington
- NFIP communityVillage of South Wilmington
- NFIP community number171013
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date08/16/12
The Village of South Wilmington participates in the National Flood Insurance Program as community 171013 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.
Grundy County, not South Wilmington
Grundy County context, not South Wilmington figures
- Establishments in Grundy County1,202
- Covered employment, Grundy County22,349
- Average annual pay, Grundy County$69,868
- Housing units permitted, Grundy County88
Every figure in this section is published for Grundy County as a whole and is not a measurement of South Wilmington.
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
South Wilmington questions, answered from the record.
How many people live in South Wilmington, Illinois?
600, in 269 households. South Wilmington village covers 0.49 square miles of land, which is 1,220 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is South Wilmington in?
Grundy County, which holds 100.0 percent of the place by area. Source: US Census Bureau, cartographic boundary file, places, 2024 vintage.
What is the median household income in South Wilmington?
$86,750. The median owner-occupied home is valued at $174,400. Median gross rent is $1,277 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to South Wilmington businesses?
1 7(a) approvals totaling $229,200 since FY2020, across 1 lenders, median approval $229,200. These count approvals to borrowers whose address is in South Wilmington, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to South Wilmington borrowers get paid back?
No rate is published for South Wilmington. Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published. The counts are shown instead.
Is South Wilmington in the National Flood Insurance Program?
Yes. South Wilmington appears in the FEMA Community Status Book as South Wilmington, village of, community 171013, 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 South Wilmington figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for Grundy 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 South Wilmington.
Is zoning published for South Wilmington?
No. Nothing on this page presents parcel level zoning.
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