HomeIllinoisLaSalle CountySeneca village
Seneca village, Illinois: commercial real estate data.
Seneca village is a Census village of 2,450 people across 6.20 square miles of land, lying across LaSalle County and Grundy County. Median household income is $86,830, 81.3 percent of occupied homes are owned, and the SBA record carries 3 7(a) approvals to borrowers here worth $1.8 m.
81 sourced place values · tier FULL · 9 sections · underlined figures are computed by MMCG Analytics, not published by the agency
Seneca
What Seneca is
- Census place typevillage
- Land area6.2 sq mi
- Water area0.37 sq mi
- Population per square mile of land395
- County holding the largest share of its areaLaSalle County, 51.7 percent
- Counties this place lies inLaSalle County 51.7 percent, Grundy County 48.3 percent
Seneca village crosses a county line. The split above is measured from the Census boundary of the place against the county boundaries, by area, so it says where the ground is and not where the town hall is.
US Census Bureau, cartographic boundary file, places, 2024 vintage. US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Seneca
How many people live in Seneca
- Population2,450
- Median age35.5 plus or minus 9.6
- Population under 18701 plus or minus 161
- Share under 1828.6 percent plus or minus 6.3
- Population 65 and over296 plus or minus 80
- Share 65 and over12.1 percent plus or minus 3.2
- Households907
- Family households643
- Share of households that are families70.9 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Seneca
Income and work in Seneca
- Median household income$86,830 plus or minus $20,382
- Per capita income$41,006
- Civilian labor force1,052
- Employed1,010
- Unemployed42 plus or minus 26
- Unemployment rate4.0 percent plus or minus 2.4
- Adults 25 and over1,597
- Adults 25 and over with a high school diploma or higher93.9 percent
- Adults 25 and over with a bachelor degree or higher14.9 percent plus or minus 4.6
- Adults 25 and over with a graduate degree2.8 percent plus or minus 1.8
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Seneca
Housing in Seneca
- Housing units968
- Occupied units907
- Vacant units61 plus or minus 46
- Vacancy rate6.3 percent plus or minus 4.7
- Owner occupied737
- Renter occupied170 plus or minus 68
- Ownership rate81.3 percent
- Median owner-occupied home value$227,500
- Median gross rent, monthly$1,149
- Annual rent as a share of median income15.9 percent plus or minus 4.0
- Single family units811
- Share single family83.8 percent
- Units in buildings of two or more93 plus or minus 52
- Share in buildings of two or more9.6 percent plus or minus 5.2
- Mobile homes64 plus or minus 55
- Median year structure built1976
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Seneca
How Seneca gets to work
- Workers 16 and over who commute894
- Commuting under 15 minutes229 plus or minus 78
- Share commuting under 15 minutes25.6 percent plus or minus 7.2
- Commuting 30 minutes or more252 plus or minus 73
- Share commuting 30 minutes or more28.2 percent plus or minus 6.2
- Drove alone77.8 percent
- Carpooled6.8 percent plus or minus 4.2
- Public transport0.0 percent
- Walked5.9 percent plus or minus 4.5
- Worked from home8.2 percent plus or minus 4.3
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
Seneca
SBA loans in Seneca (7(a))
- Approvals3
- Gross approval$1,771,300
- Average approval$590,433
- Median approval$475,000
- Ninetieth percentile approval$921,300
- Largest approval$921,300
- Jobs supported44
- Jobs per approval14.7
- 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 lenders2
- Distinct industries by NAICS2
A charge-off rate is not published here. only 0 resolved loans, too few to publish a rate, and a rate over that few outcomes would move several points on one loan.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Seneca
SBA loans in Seneca (504)
- Approvals1
- Gross approval$3,464,000
- Average approval$3,464,000
- Median approval$3,464,000
- Largest approval$3,464,000
- Jobs supported5
- Loans with a final outcome0
- Charged off0
- Median term300 months
- Distinct CDCs1
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
Seneca
Flood risk in Seneca
- Listed NFIP communities1
- Of those, participating1
- NFIP community number170407
- Currently effective map date08/02/12
This community carries no Community Rating System class, so no CRS premium discount applies to it.
FEMA, National Flood Insurance Program Community Status Book, Community Status Book, as retrieved.
LaSalle County, not Seneca
LaSalle County context, not Seneca figures
These are LaSalle County figures. There is no place level equivalent published for any of them, so they are shown as the county backdrop and never as Seneca measurements.
- Establishments in LaSalle County2,523
- Employment at those establishments, LaSalle County33,721
- Covered employment, LaSalle County39,242
- Average annual pay, LaSalle County$58,537
- Average weekly wage, LaSalle County$1,126
- Housing units permitted, LaSalle County77
- Of those, single family, LaSalle County77
- County product, 2024, LaSalle County$7,670,127,000
- County product change over the prior year, LaSalle County-0.2 percent
- Average income of an arriving household, LaSalle County$56,296
Every figure in this section is published for LaSalle County as a whole and is not a measurement of Seneca. It is here because a county backdrop is what a credit committee reads a place against, and it is labelled so that it can never be quoted as the place's own.
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. US Bureau of Economic Analysis, Regional, table CAGDP2, CAGDP2, through 2024. US Internal Revenue Service, Statistics of Income county migration flows, 2021 to 2022 filing years.
Coverage
What this page does not hold.
Every item below could be filled with a plausible figure. None of them is. On a page a lender may read, a number that cannot be traced is worse than an absence, so the absences are named.
- Parcel level detail, zoning and flood zone at an address are resolved in the platform, not on this page.
SBA figures count approvals to borrowers whose address is in the place. They are not approvals for projects inside the place boundary: the tape records a borrower city and a project county, and those can differ.
Common questions
Seneca questions, answered from the record.
How many people live in Seneca, Illinois?
2,450, in 907 households. Seneca village covers 6.20 square miles of land, which is 395 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is Seneca in?
Seneca lies in more than one. By area it is 51.7 percent in LaSalle County, 48.3 percent in Grundy County. This page sits under LaSalle County because that county holds the largest share. The split is measured from the Census boundary of the place against the county boundaries.
What is the median household income in Seneca?
$86,830. The median owner-occupied home is valued at $227,500. Median gross rent is $1,149 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to Seneca businesses?
3 7(a) approvals totalling $1.8 m, across 2 lenders, median approval $475,000, plus 1 504 approvals worth $3.5 m. These count approvals to borrowers whose address is in Seneca, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to Seneca borrowers get paid back?
No rate is published for Seneca. only 0 resolved loans, too few to publish a rate, and a percentage over that few outcomes would move several points on a single loan. The counts are shown instead.
Is Seneca in the National Flood Insurance Program?
Yes. Seneca appears in the FEMA Community Status Book as community 170407, 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 Seneca figures?
No, and they are labelled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for LaSalle 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 Seneca.
Is zoning published for Seneca?
Not yet. The zoning layer is in build. Nothing on this page presents parcel level zoning.
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