Iowa County Agricultural Profiles: Regional Differences and Data

Iowa's 99 counties don't farm the same way — not even close. Soil types, drainage patterns, historical settlement, and proximity to processing infrastructure have pushed different regions toward different commodities over generations, and the data reflects those divergences in striking detail. This page maps the major regional agricultural patterns across Iowa, explains why those differences exist and persist, and identifies the key data sources that document them.

Definition and scope

A county agricultural profile is a structured snapshot of a county's farming activity — covering land use, crop mix, livestock populations, farm size, income levels, and tenure arrangements. The USDA National Agricultural Statistics Service (NASS) compiles this data through the Census of Agriculture, conducted every five years, with the most recent release covering 2022. Iowa's profiles draw on that federal dataset supplemented by Iowa State University Extension and Outreach county-level summaries and the Iowa Department of Agriculture and Land Stewardship (IDALS).

Scope and coverage: This page covers Iowa's agricultural county data within the state's geographic and regulatory jurisdiction. It does not address federal farm program eligibility determinations, which fall under USDA Farm Service Agency (FSA) administration at the federal level, nor does it cover cross-border commodity flows into Nebraska, South Dakota, Minnesota, Wisconsin, Missouri, or Illinois. County-level tax assessment methodology is a county auditor function and is not covered here. For a broader orientation to Iowa agriculture as a whole, the Iowa Agriculture overview provides statewide context.

How it works

The 2022 Census of Agriculture captures approximately 84,800 farms across Iowa's 99 counties — a figure that has declined steadily as average farm size increases. NASS organizes county data into standardized tables covering:

  1. Land in farms (acres) — total farmland, cropland, pastureland, and woodland by county
  2. Principal crops harvested — acres and yields for corn, soybeans, oats, hay, and other crops
  3. Livestock inventories — hog, cattle, dairy cow, and poultry counts
  4. Farm operator characteristics — age, tenure, primary occupation, and beginning farmer status
  5. Market value of products sold — separated into crop and livestock categories
  6. Production expenses — feed, fertilizer, hired labor, fuel, and land rent costs

Iowa State University Extension county agricultural profiles layer onto this foundation, adding soil productivity ratings (using the Iowa Crop Reporting District system and the Iowa State Soil Rating for Plant Growth, or ISPG) and localized price and cost data relevant to Iowa farm economics.

The state is conventionally divided into nine crop reporting districts — Northwest, North Central, Northeast, West Central, Central, East Central, Southwest, South Central, and Southeast — and patterns within those districts are more consistent than county-to-county comparisons, which can be distorted by a single large operation.

Common scenarios

Northern tier counties: corn-soybean intensity. Cerro Gordo, Kossuth, and Winnebago counties in the north-central district sit on some of the highly rated soils in the state. Kossuth County alone ranks among Iowa's top five counties by total acres harvested, reflecting flat glacial till plains ideal for large-scale row crop production. Iowa corn farming and Iowa soybean farming dominate here, with relatively limited livestock density compared to the west.

Western Iowa: hog concentration and loess hills. Sioux County in the northwest corner has historically ranked first or second statewide in hog inventory — in some census years exceeding 5 million hogs, a number that exceeds the human population of Iowa by a factor greater than 1.5. The Dutch Reformed agricultural communities that settled the region brought intensive livestock husbandry practices that persist today. Iowa hog production patterns across Plymouth, Cherokee, and O'Brien counties reflect this same concentration.

Northeast Iowa: dairy and topography. Winneshiek, Allamakee, and Clayton counties lie in the Driftless Area — glacially unscoured karst terrain with steep slopes, sinkholes, and cold-water trout streams. Row crop production is constrained by topography. Iowa dairy farming thrives here instead, with grass-based systems fitting the landscape better than a combine. The region also supports Iowa specialty crops including small grains and vegetables, partly enabled by the cooler microclimate.

Southern Iowa: transition to grazing. Decatur, Ringgold, and Wayne counties in the south-central district have lower soil productivity ratings and more rolling terrain. Cattle-cow operations outnumber finishing operations here, and Iowa soil conservation practices including terracing and contour farming are more prevalent due to erosion risk on sloped ground.

Decision boundaries

Knowing which county category applies shapes several practical decisions:

The contrast between a 600-acre continuous corn-soybean operation in Kossuth County and a 180-acre diversified dairy farm in Winneshiek County isn't merely aesthetic. It represents genuinely different economics, different policy interactions, and different risk profiles — which is why county-level data remains indispensable for anyone trying to understand Iowa agriculture from the ground up.

References

Read Next

Iowa Farm Economics: Income, Land Values, and Market Forces The economics driving that output are layered and sometimes counterintuitive: land values that defy down commodity cycles,... Iowa Corn Farming: Varieties, Yields, and Uses This page covers how Iowa corn farming actually works: the agronomic practices that drive yields, the market channels that... Iowa Soybean Farming: Production Practices and Markets Soybeans drive a significant share of Iowa's agricultural revenue, feed into both domestic processing and international export...