Warren County, Illinois: commercial real estate data.
Warren County, Illinois had an estimated 16,217 residents on July 1, 2024, down 3.7 percent since the 2020 census base of 16,842, across 542 square miles. County output reached $1.10 bn in 2024, 351 establishments operate here, and the SBA record carries 1 7(a) approvals worth $100,000 since FY2020.
Underlined figures are computed by MMCG Analytics, not published by the agency.
Warren County
How many people live in Warren County
- Population, American Community Survey 2020-202416,447
- Households6,787
- Average household size2.42
- Median household income$67,385
- Median age38.5
- Median gross rent$788 per month
- Median owner-occupied home value$105,000
- Home value to household income1.6 times
- Annual rent as a share of median income14.0 percent
- Adults 25 and over with a bachelor degree or higher22.0 percent
- Adults 25 and over with a graduate degree7.9 percent
- Adults 25 and over10,726
- Population under 183,693
- Share under 1822.5 percent
- Population 65 and over3,286
- Share 65 and over20.0 percent
- Working age population, 18 to 649,468
- Civilian labor force8,021
- Unemployment rate3.6 percent
- Labor force participation, adults 18 and over62.9 percent
- Rank by population among Illinois counties65th of 102
- Rank by population among US county-equivalents, Puerto Rico included2075th of 3,222
Warren County is the 65th largest of 102 Illinois counties by population. A median home costs 1.6 times median household income, which is affordable by national standards. Residents under 18 outnumber those 65 and over, at 22.5 percent against 20.0 percent, a household formation profile rather than a retirement one.
US Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 5-year.
Warren County
Is Warren County's population growing?
- Population, July 1, 202416,217
- Census 2020 base population16,842
- Population change since the 2020 census base-3.71 percent
- Population change, 2023 to 2024-7
- Births, 2024190
- Deaths, 2024191
- Natural change, 2024-1
- Net domestic migration, 2024-71
- Net international migration, 202465
- Total net migration, 2024-6
- Cumulative net domestic migration, 2021 to 2024-696
- Rank by growth among US county-equivalents2853rd of 3,144
The county has lost 3.71 percent of its population 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.
Warren County
Where are people moving to Warren County from?
- Tax returns filed by households arriving369
- People arriving, from those returns681
- Tax returns filed by households leaving474
- Net household movement-105
- Adjusted gross income arriving$17.1 m
- Net adjusted gross income movement$-7.1 m
- Average income of an arriving household$46,255
- Average income of a leaving household$51,032
- Largest single originKnox County (89 households)
- Largest single destinationKnox County (117 households)
| Origin | Households | People | Adjusted gross income |
|---|---|---|---|
| Knox County | 89 | 164 | $3.5 m |
| Mercer County | 29 | 46 | $1.5 m |
| McDonough County | 25 | 43 | $1.4 m |
Households arriving report $4,777 less average income than households leaving, which drains spending power even where headcount holds up. The largest single source of arrivals is Knox County, which is the catchment a retail or multifamily study should look at first.
US Internal Revenue Service, Statistics of Income county migration flows, 2021 to 2022 filing years.
Warren County
What is the Warren County economy?
- County GDP, 2024$1.10 bn
- County GDP, 2023$1.09 bn
- GDP change, 2023 to 20240.7 percent
- GDP change over five years34.2 percent
- Rank by GDP among the Illinois areas BEA publishes61st of 102
- Rank by GDP among the US county areas BEA publishes1764th of 3,127
- GDP per resident$66,712
Output grew 0.7 percent in the latest year and 34.2 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.
Warren County
Employment by industry in Warren County
- Covered employment, annual average6,368
- Establishments reporting378
- Average annual pay$45,522
- Average weekly wage$875
- Manufacturing, employment1,997
- Manufacturing, average annual pay$56,078
- Accommodation and food services, employment503
- Accommodation and food services, average annual pay$17,718
- Retail trade, employment498
- Retail trade, average annual pay$34,571
- Agriculture, forestry, fishing and hunting, employment269
- Agriculture, forestry, fishing and hunting, average annual pay$55,244
- Transportation and warehousing, employment266
- Wholesale trade, employment232
| Sector | Employment | Establishments | Average annual pay |
|---|---|---|---|
| Manufacturing | 1,997 | 15 | $56,078 |
| Accommodation and food services | 503 | 36 | $17,718 |
| Retail trade | 498 | 43 | $34,571 |
| Agriculture, forestry, fishing and hunting | 269 | 21 | $55,244 |
| Transportation and warehousing | 266 | 25 | $58,005 |
| Wholesale trade | 232 | 30 | $66,574 |
| Professional, scientific and technical services | 201 | 22 | $24,728 |
| Other services, except public administration | 187 | 38 | $23,693 |
Manufacturing is the largest private sector at 1,997 jobs, 31.4 percent of covered employment.
US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages.
Warren County
How many businesses are in Warren County?
- Establishments, all industries351
- Employment at those establishments5,447
- Annual payroll$244.9 m
- Establishments per 1,000 residents21.3
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.
Warren County
Building permits in Warren County
- Housing units authorized by permit, 20249
- Declared construction value permitted$1.3 m
- Single family units authorized9
- Multifamily units authorized0
- Multifamily share of units0.0 percent
- Average declared value per unit$147,378
- Units authorized per 1,000 households1.3
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.
Warren County
SBA loans in Warren County (7(a) and 504)
- 7(a) approvals recorded1
- 7(a) gross approval dollars$100,000
- Average 7(a) approval$100,000
- Median 7(a) approval$100,000
- Largest single approval$100,000
- Jobs reported supported, 7(a)12
- Jobs per approval12.0
- Distinct 7(a) lenders active1
- Distinct industries receiving approvals1
- Median 7(a) term120 months
- Share of loans on real estate terms, 240 months or longer0.0 percent
- Loans on real estate terms0
- Loans on working capital terms, 120 months or shorter1
- Franchise loans0
- Franchise share of approvals0.0 percent
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Warren County
SBA loan default and charge-off rates in Warren County
Do SBA loans in Warren County get paid back?
- Loans with a final outcome recorded0
- Paid in full0
- Charged off0
- Status: Exempt from disclosure1
Only 0 loans have reached a final outcome, fewer than the 30 a charge-off rate needs, so no rate is published.
Compare against the national and state SBA charge-off rates, computed the same way over resolved loans only.
US Small Business Administration, 7(a) FOIA release, FY2020 to FY2026 year to date, as of 2026-06-30.
Warren County
How large is Warren County?
- Land area542 sq mi
- Rank by land area among Illinois counties47th of 102
- Width, east to west18.4 mi
- Height, north to south30.4 mi
- Geographies sharing a boundary5
- Residents per square mile of land30
- Establishments per square mile0.65
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.
Warren County
Flood risk in Warren County
- Participation of the county's own NFIP community Warren County, unincorporated areasParticipating, community 170673
- Communities in the county in the NFIP Community Status Book6
- Of those, participating in the NFIP5
- NFIP participation rate83.3 percent
- Communities carrying a CRS class0
- Radon levels in Warren 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 Warren County (community 170673), participates in the National Flood Insurance Program and carries no Community Rating System class, so no CRS premium discount applies there. The EPA places Warren 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. 83.3 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 Warren 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 Warren County site starts with the figures you are reading, carrying the same source and period into the credit file.
- Population, American Community Survey 2020-202416,447
- Households6,787
- Average household size2.42
- Median household income$67,385
- Median age38.5
Common questions
Warren County questions, answered from the record.
How many people live in Warren County, Illinois?
The Census Bureau estimates 16,217 residents on July 1, 2024 (US Census Bureau, Population Estimates Program, Vintage 2024). The American Community Survey 2020-2024 five-year estimate is 16,447, in 6,787 households, ranking 65th of 102 Illinois counties. Source: US Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 5-year.
Is Warren County's population growing?
The population has fallen 3.71 percent since the 2020 census base of 16,842, to 16,217 on July 1, 2024. In 2024 there were 190 births against 191 deaths, with net migration of -6. Source: US Census Bureau, Population Estimates Program, Vintage 2024, Vintage 2024, estimates 2020 to 2024.
What is the median household income in Warren County?
$67,385. The median owner-occupied home is valued at $105,000, which is 1.6 times income, and median gross rent is $788 per month. Source: US Census Bureau, American Community Survey 5-Year Estimates, 2020-2024 5-year.
How many businesses are in Warren County?
351 establishments, employing 5,447 people with an annual payroll of $244.9 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 Warren County?
Manufacturing is the largest private sector at 1,997 jobs, 31.4 percent of covered employment. Covered employment averages 6,368 jobs at an average annual pay of $45,522, or $875 a week. Source: US Bureau of Labor Statistics, Quarterly Census of Employment and Wages, 2024 annual averages.
How much SBA lending happens in Warren County?
1 7(a) approvals totaling $100,000 since FY2020, across 1 lenders, with a median approval of $100,000. These are approvals recorded in the release, not loans disbursed.
How many building permits were issued in Warren County?
9 housing units were authorized by permit in 2024, with a declared construction value of $1.3 m. Multifamily was 0.0 percent of units. Source: US Census Bureau, Building Permits Survey, 2024 annual.
What is the radon zone for Warren 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.
Where do people moving to Warren County come from?
The largest single origin is Knox County, with 89 households. Arriving households report an average income of $46,255 against $51,032 for those leaving. Source: US Internal Revenue Service, Statistics of Income county migration flows, 2021 to 2022 filing years.
Are traffic counts available for Warren 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 Warren 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.
Warren County
Cities and places in Warren.
7 Census places lie wholly or partly in Warren County. All 7 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 |
|---|---|---|---|---|
| Monmouth | city | 8,581 | 1 | Wholly in this county |
| Roseville | village | 823 | None recorded | Wholly in this county |
| Alexis | village | 814 | None recorded | 62.3 percent here, 37.7 percent Mercer County |
| Kirkwood | village | 754 | None recorded | Wholly in this county |
| Avon | village | 694 | None recorded | 3.2 percent here, 96.8 percent Fulton County |
| Little York | village | 379 | None recorded | Wholly in this county |
| Cameron | CDP | 280 | None recorded | Wholly in this county |
Nearby