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Iowa: county data, all 99 of them.

Every Iowa county has a data page built from federal sources, each figure carrying its publisher and period. What this page does not carry is the Iowa statutory framework, and the reason is below rather than hidden.

Counties
99
Population
3,210,507
Land area
55,857 sq mi
Establishments
82,731
Combined county GDP
$265.79 bn
SBA approvals recorded
3,729

Read this first

This is a county directory, not a state guide.

The county pages below are complete. They carry demographics, growth and migration, economic output, employment and wages, business establishments by industry, the construction pipeline, the SBA lending record including charge off rates, geography and hazard. Every figure names its publisher and the period it describes.

What is missing is the Iowa legal and regulatory frame: how zoning and land development codes work in this state, what the entitlement path looks like, which agencies permit what, and which statutes override local codes. That material requires a research pack for Iowa, and no such pack exists yet.

Why there is no state guide here

You cannot write Iowa zoning law from a population table. Everything on the county pages is derived from federal datasets that cover all counties equally; statutory analysis is not, and generating it anyway would produce confident text about the law that nothing behind it supports.

Florida and California have research packs and therefore have full state guides. The remaining eight, including this one, do not. That is stated rather than papered over.

Counties

All 99 Iowa county-equivalents.

Iowa counties: population, income, establishments and SBA activity
GeographyPopulationMedian incomeEstablishmentsCounty GDPSBA approvalsLand area, sq mi
Adair County7,460$68,092208$662.6 m3569
Adams County3,622$71,87598$265.9 mNone recorded423
Allamakee County14,092$70,694365$780.2 m4639
Appanoose County12,184$54,934302$518.5 m29497
Audubon County5,599$58,229184$472.6 mNone recorded443
Benton County25,724$86,962535$1.14 bn26716
Black Hawk County131,049$66,4173,105$10.04 bn200566
Boone County26,668$83,531603$1.29 bn32572
Bremer County25,204$86,784552$1.58 bn35435
Buchanan County20,694$78,236490$1.09 bn18571
Buena Vista County20,753$71,719491$1.94 bn13575
Butler County14,268$73,715324$705.3 m10580
Calhoun County9,803$64,964280$559.9 m8570
Carroll County20,594$72,930827$1.84 bn23569
Cass County13,096$63,013444$990.9 m2564
Cedar County18,349$80,602460$811.5 m24579
Cerro Gordo County42,632$68,1891,357$3.73 bn84568
Cherokee County11,600$71,269340$1.09 bn11577
Chickasaw County11,807$75,675353$1.09 bn15504
Clarke County9,662$71,641188$638.9 m4431
Clay County16,461$65,428570$1.54 bn28567
Clayton County17,013$67,242487$1.18 bn8779
Clinton County46,268$66,9811,122$2.95 bn62695
Crawford County16,277$67,027415$1.12 bn18714
Dallas County107,968$102,3792,521$11.11 bn154588
Davis County9,157$77,194179$407.3 m10502
Decatur County7,759$59,044146$277.6 m2532
Delaware County17,558$74,989522$1.26 bn19578
Des Moines County38,487$62,9281,065$2.92 bn18416
Dickinson County17,990$75,432784$1.53 bn64381
Dubuque County99,030$77,6302,804$9.16 bn99608
Emmet County9,262$63,730268$519.1 m7396
Fayette County19,288$60,165524$1.07 bn18731
Floyd County15,328$68,557371$1.17 bn23501
Franklin County9,956$59,894285$789.8 m7582
Fremont County6,514$71,621190$394.1 m4511
Greene County8,688$63,409252$720.8 m3570
Grundy County12,384$87,205299$731.7 m15502
Guthrie County10,688$77,711313$752.5 m14591
Hamilton County14,886$72,432367$1.12 bn8577
Hancock County10,671$70,601302$1.20 bn17571
Hardin County16,639$65,069499$1.14 bn7569
Harrison County14,632$79,535338$674.6 m9697
Henry County20,004$67,436482$1.15 bn17434
Howard County9,445$67,446270$727.4 m3473
Humboldt County9,591$71,946305$598.2 m15434
Ida County6,911$63,073244$745.6 m26432
Iowa County16,507$71,223459$1.27 bn15586
Jackson County19,390$74,186515$906.7 m9636
Jasper County37,954$71,311767$1.52 bn36730
Jefferson County15,705$61,620608$911.3 m13436
Johnson County156,639$74,9353,490$12.64 bn132614
Jones County20,896$73,531514$858.3 m23576
Keokuk County9,924$62,329236$442.6 m12579
Kossuth County14,516$67,697536$1.40 bn10973
Lee County32,893$62,382786$2.26 bn6518
Linn County230,004$77,6495,744$21.90 bn338717
Louisa County10,678$77,354211$930.4 m3402
Lucas County8,716$61,793187$362.4 mNone recorded431
Lyon County12,162$76,746402$1.43 bn34588
Madison County16,926$90,855435$684.3 m16561
Mahaska County22,021$70,940538$1.19 bn18571
Marion County33,642$78,680859$2.88 bn35555
Marshall County40,114$73,315786$2.32 bn13573
Mills County14,568$90,753331$645.3 m11437
Mitchell County10,575$71,365302$994.8 m12469
Monona County8,557$68,377228$462.0 m5694
Monroe County7,513$70,996183$619.0 m12434
Montgomery County10,214$63,666294$557.2 m9424
Muscatine County42,559$69,396949$3.24 bn35437
O'Brien County14,126$68,356488$1.25 bn14573
Osceola County6,100$69,239192$602.1 m4399
Page County15,131$57,953404$810.6 m5535
Palo Alto County8,863$72,781272$796.3 m12564
Plymouth County25,747$83,251667$2.00 bn29863
Pocahontas County7,046$61,875200$641.7 m7577
Polk County503,175$83,57613,890$63.82 bn824574
Pottawattamie County93,424$73,6021,920$6.26 bn80950
Poweshiek County18,545$67,391571$1.65 bn13585
Ringgold County4,645$73,346131$233.7 m7535
Sac County9,689$73,838321$793.7 m6575
Scott County174,608$78,2774,525$13.29 bn215458
Shelby County11,778$72,738384$1.05 bn10591
Sioux County36,212$86,0981,345$3.92 bn52768
Story County100,466$69,6852,162$7.79 bn91573
Tama County16,868$70,781282$847.9 m12721
Taylor County5,868$67,740140$375.9 m5532
Union County11,993$57,772305$964.9 m9424
Van Buren County7,241$61,161149$295.0 m7485
Wapello County35,362$64,766699$2.16 bn33432
Warren County54,409$94,5881,020$1.89 bn103570
Washington County22,561$75,647687$1.86 bn19569
Wayne County6,532$61,964143$316.5 m3525
Webster County36,886$68,975997$2.76 bn30716
Winnebago County10,583$67,642300$690.1 m7400
Winneshiek County19,873$79,066604$1.35 bn12690
Woodbury County106,247$73,6582,622$7.03 bn97873
Worth County7,350$78,008163$485.0 m5400
Wright County12,791$67,190358$1.25 bn5580

The register

Every source behind these 99 pages.

SourcePeriod coveredLicence
US Census Bureau, American Community Survey 5-Year Estimates2020-2024 5-yearUS Census Bureau, public domain
US Census Bureau, Population Estimates Program, Vintage 2024Vintage 2024, estimates 2020 to 2024US Census Bureau, public domain
US Bureau of Economic Analysis, Regional, table CAGDP2CAGDP2, through 2024US Bureau of Economic Analysis, public domain
US EPA, Map of Radon Zones, county spreadsheet2024-05 publication, EPA 402/A-16/001US EPA, public domain
FEMA OpenFEMA, NFIP Community Status BookCommunity Status Book, as retrievedFEMA OpenFEMA, public domain
US Small Business Administration, 7(a) FOIA releaseFY2020 to FY2026 year to date, as of 2026-06-30FOIA release, public domain
US Small Business Administration, 504 FOIA releaseFY2010 to FY2026 year to date, as of 2026-06-30FOIA release, public domain
US Census Bureau county boundary geometry, TIGER, adjacency computed from shared boundary verticesTIGER county boundariesUS Census Bureau, public domain
US Census Bureau, County Business Patterns2023US Census Bureau, public domain
US Bureau of Labor Statistics, Quarterly Census of Employment and Wages2024 annual averagesUS BLS, public domain
US Census Bureau, Building Permits Survey2024 annualUS Census Bureau, public domain
US Internal Revenue Service, Statistics of Income county migration flows2021 to 2022 filing yearsIRS SOI, public domain

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