HomeIllinoisSt. Clair CountyO'Fallon
O'Fallon, Illinois: commercial real estate data.
O'Fallon is a Census city of 32,262 people across 15.80 square miles of land, in St. Clair County. Median household income is $105,982, 70.2 percent of occupied homes are owned, and the SBA record carries 40 7(a) approvals to borrowers here worth $14.4 m since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
O'Fallon
What O'Fallon is
- Census place typecity
- Land area15.8 sq mi
- Water area0.11 sq mi
- Population per square mile of land2,041
- County holding the largest share of its areaSt. Clair 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.
O'Fallon
How many people live in O'Fallon
- Population32,262
- Median age37.8
- Population under 188,437
- Share under 1826.2 percent
- Population 65 and over5,382
- Share 65 and over16.7 percent
- Households12,816
- Family households9,141
- Share of households that are families71.3 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
O'Fallon
Income and work in O'Fallon
- Median household income$105,982
- Per capita income$54,265
- Civilian labor force15,603
- Employed15,026
- Unemployed577 plus or minus 179
- Unemployment rate3.7 percent plus or minus 1.1
- Adults 25 and over21,890
- Adults 25 and over with a high school diploma or higher97.6 percent
- Adults 25 and over with a bachelor degree or higher52.4 percent
- Adults 25 and over with a graduate degree23.4 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
O'Fallon
Housing in O'Fallon
- Housing units13,530
- Occupied units12,816
- Vacant units714 plus or minus 302
- Vacancy rate5.3 percent plus or minus 2.2
- Owner occupied8,997
- Renter occupied3,819
- Ownership rate70.2 percent
- Median owner-occupied home value$295,700
- Median gross rent, monthly$1,332
- Annual rent as a share of median income15.1 percent
- Single family units10,079
- Share single family74.5 percent
- Units in buildings of two or more3,019
- Share in buildings of two or more22.3 percent
- Mobile homes423 plus or minus 162
- Median year structure built1997
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
O'Fallon
How O'Fallon gets to work
- Workers 16 and over who commute12,089
- Commuting under 15 minutes3,493
- Share commuting under 15 minutes28.9 percent
- Commuting 30 minutes or more3,975
- Share commuting 30 minutes or more32.9 percent
- Drove alone70.5 percent
- Carpooled6.1 percent plus or minus 1.9
- Public transport0.5 percent plus or minus 0.3
- Walked2.2 percent plus or minus 1.9
- Worked from home20.4 percent
US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
O'Fallon
SBA loans in O'Fallon (7(a))
- Approvals40
- Gross approval$14,444,300
- Average approval$361,108
- Median approval$199,000
- Ninetieth percentile approval$692,760
- Largest approval$2,395,000
- Jobs supported658
- Jobs per approval16.4
- Loans with a final outcome12
- Paid in full9
- Charged off3
- Median term120 months
- Share on real estate terms of 20 years or more10.0 percent
- Share to franchises30.0 percent
- Distinct lenders20
- Distinct industries by NAICS22
Counted by borrower city: approvals to borrowers whose address is in O'Fallon, in any county, FY2020 to FY2026. Only 12 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.
O'Fallon
SBA loans in O'Fallon (504)
- Approvals19
- Gross approval$15,767,000
- Average approval$829,842
- Median approval$426,000
- Largest approval$2,079,000
- Jobs supported327
- Loans with a final outcome8
- Charged off1
- Median term240 months
- Distinct CDCs5
Counted by borrower city: approvals to borrowers whose address is in O'Fallon, in any county, FY2010 to FY2026. Only 8 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
US Small Business Administration, 504 FOIA release, FY2010 to FY2026 year to date, as of 2026-06-30.
O'Fallon
Flood risk in O'Fallon
- NFIP communityCity of O'Fallon
- NFIP community number170633
- Participating in the NFIPYes
- Community Rating System classNone
- Currently effective map date11/05/03
The City of O'Fallon participates in the National Flood Insurance Program as community 170633 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.
St. Clair County, not O'Fallon
St. Clair County context, not O'Fallon figures
- Establishments in St. Clair County4,973
- Covered employment, St. Clair County89,981
- Average annual pay, St. Clair County$57,001
- Housing units permitted, St. Clair County740
Every figure in this section is published for St. Clair County as a whole and is not a measurement of O'Fallon.
All St. Clair County figures →
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
O'Fallon questions, answered from the record.
How many people live in O'Fallon, Illinois?
32,262, in 12,816 households. O'Fallon city covers 15.80 square miles of land, which is 2,041 people per square mile. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
What county is O'Fallon in?
St. Clair 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 O'Fallon?
$105,982. The median owner-occupied home is valued at $295,700. Median gross rent is $1,332 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, place level, 2020-2024 5-year.
How much SBA lending goes to O'Fallon businesses?
40 7(a) approvals totaling $14.4 m since FY2020, across 20 lenders, median approval $199,000, plus 19 504 approvals worth $15.8 m since FY2010. These count approvals to borrowers whose address is in O'Fallon, not projects sited inside the place boundary, and they are approvals recorded in the release rather than loans disbursed.
Do SBA loans to O'Fallon borrowers get paid back?
No rate is published for O'Fallon. Only 12 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 O'Fallon in the National Flood Insurance Program?
Yes. O'Fallon appears in the FEMA Community Status Book as O'Fallon, city of, community 170633, 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 O'Fallon figures?
No, and they are labeled so. County Business Patterns, QCEW, the Building Permits Survey, BEA product and IRS migration are published for St. Clair 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 O'Fallon.
Is zoning published for O'Fallon?
No. Nothing on this page presents parcel level zoning.