Williamson County, Illinois
Williamson County, IL: non-irrigated cash rent $101 an acre (2026); land and buildings $4,701 an acre in the 2022 census; median corn yield 153.2 bu/ac. County averages from public records, not an appraisal of any farm. FIPS 17199. Figures as of 2026-09-20.
Non-irrigated cash rent here runs $101 per acre, up 18.1 percent from 2016 to 2026. None of the harvested cropland is irrigated, per the 2022 census. Corn yields have trended up 2.5 bushels per acre a year on published years 2008-2024, with a median of 153.2 bushels per acre and a worst year of 33.7 in 2012. Crop insurance losses over 1989-2025 total $54.5 million, with excess moisture and flood the largest cause at 51 percent; heat and drought's share moved from 45 percent in 1989-1999 to 20 percent in 2000-2009, 50 percent in 2010-2019, and 30 percent in 2020-2025. July nights average 69 F over 2017-2026, against a 1991-2020 normal of 67.5 F, and the long trend since 1976 runs 0.55 F per decade, warming.
IL median $254 · 2nd lowest of 86
IL median $8,638 · 5th lowest of 91
IL median 190.2 · 6th lowest of 82
IL median $2.04 · 6th highest of 101
IL median 55% · 12th lowest of 101
Cash rent
Dollars per acre, USDA NASS county survey. A break in a line is a year with no published survey; nothing is drawn across it.
Land value
Corn yield
Bushels per acre, USDA NASS county yields, all practices. The dashed line is the median of the published years.
Crop insurance record
Claims paid divided by total premium (the farmer share plus the federal subsidy), each closed crop year since 1989. Above the dashed line, the county's insurance book paid out more than it took in. 2026, still open, is left out.
Drought and weather
Weeks per year, U.S. Drought Monitor, with half the county or more in D2 (severe) drought or worse.
Land, water and programs
Acres enrolled in the Conservation Reserve Program, USDA FSA, by fiscal year.
Next door
| County | Dry rent | Land value | Corn yield | Claims per $100 |
|---|---|---|---|---|
| Williamson County | $101 | $4,701 | 153.2 | $11.52 |
| Franklin County | $126 | $5,677 | 152.4 | $8.36 |
| Jackson County | $172 | $5,094 | 162.2 | $5.88 |
| Johnson County | $129 2025 | $4,327 | — | $13.45 |
| Saline County | $150 | $4,910 | 170.3 | $5.68 |
| Union County | $87 | $5,116 | — | $12.50 |
| Median next door | $138 | $5,094 | 162.2 | $8.36 |
Counties that share a stretch of boundary. An older rent carries its year and stays out of the median.
Cite this page
AGSIST Farmland Atlas. Williamson County, Illinois. Figures as of 2026-09-20, from USDA NASS, USDA RMA, USDA FSA, the U.S. Drought Monitor and NOAA. https://agsist.com/farmland-atlas/illinois/williamson-countyEvery figure is a county average from the sources named below. Ranks count counties with 10,000 acres or more in farms, in the same survey year for rent, within the state. Methods: how each figure is built. Downloads: all counties, CSV.
Sources, dates and arithmetic
"Figures as of" is the date this page's numbers last changed; it moves only when a figure on the page does. Source files and their retrieval dates are listed on the data page.
Rent: USDA NASS Cash Rents Survey, county. Land value: Census of Agriculture, operators' estimate of land and buildings. Yield: NASS county corn yields, trend fitted here over every published year since 2008. Loss ratio: claims (indemnity) divided by total premium, USDA RMA Summary of Business, 1989 on, open crop year left out. Drought: U.S. Drought Monitor, weeks with half the county or more in D2 or worse. July lows: NOAA nClimDiv county monthly minimum temperature. A dash means the record does not carry the figure or the source withheld it; the reason is printed beside it.