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Il County Directory

County-level affordability, income limits, and rent data from official HUD, IRS, and BLS sources.

Updated Jun 19, 2026 · Dataset v2 · HUD FY2026 · FMR FY2026 · IRS 2025 · BLS CPI-U 2013–2025

Il at a glance

Counties indexed

102

State median income

$93,100

per year · HUD Area Median Income

State median FMR (2BR)

$954

per month · HUD Fair Market Rent

Most affordable county

Effingham County

10.5% rent burden

Highest income: Kendall County$135,800/yr
Lowest income: Pulaski County$65,900/yr
Highest rent: Kendall County$2,050/mo

Top counties by signal

Highest median income

  1. 1.Kendall County$135,800/yr
  2. 2.Cook County$121,500/yr
  3. 3.DuPage County$121,500/yr
  4. 4.Kane County$121,500/yr
  5. 5.Lake County$121,500/yr

Highest Fair Market Rent (2BR)

  1. 1.Kendall County$2,050/mo
  2. 2.Cook County$1,781/mo
  3. 3.DuPage County$1,781/mo
  4. 4.Kane County$1,781/mo
  5. 5.Lake County$1,781/mo

Highest rent burden

  1. 1.Kendall County18.1%
  2. 2.Cook County17.6%
  3. 3.DuPage County17.6%
  4. 4.Kane County17.6%
  5. 5.Lake County17.6%

Burden = (12 × FMR 2BR) ÷ median income

Featured clusters

County groupings by affordability profile.

Income Leaders

Highest HUD Area Median Income

Most Affordable

Lowest annual rent burden

High Rent Markets

Highest HUD Fair Market Rents

Results
102 counties
Adams County
Median income: $91,100
FMR (2BR): $1,064
Alexander County
Median income: $90,200
FMR (2BR): $992
Bond County
Median income: $102,700
FMR (2BR): $916
Boone County
Median income: $89,400
FMR (2BR): $1,175
Brown County
Median income: $90,000
FMR (2BR): $1,063
Bureau County
Median income: $91,900
FMR (2BR): $1,035
Calhoun County
Median income: $113,500
FMR (2BR): $1,218
Carroll County
Median income: $82,900
FMR (2BR): $916
Cass County
Median income: $83,400
FMR (2BR): $916
Champaign County
Median income: $114,300
FMR (2BR): $1,122
Christian County
Median income: $90,600
FMR (2BR): $974
Clark County
Median income: $93,200
FMR (2BR): $1,009
Clay County
Median income: $77,900
FMR (2BR): $916
Clinton County
Median income: $113,500
FMR (2BR): $1,218
Coles County
Median income: $78,300
FMR (2BR): $965
Cook County
Median income: $121,500
FMR (2BR): $1,781
Crawford County
Median income: $99,000
FMR (2BR): $916
Cumberland County
Median income: $101,100
FMR (2BR): $916
De Witt County
Median income: $104,100
FMR (2BR): $1,036
DeKalb County
Median income: $112,500
FMR (2BR): $1,373
Douglas County
Median income: $97,900
FMR (2BR): $916
DuPage County
Median income: $121,500
FMR (2BR): $1,781
Edgar County
Median income: $80,300
FMR (2BR): $916
Edwards County
Median income: $78,500
FMR (2BR): $916
Effingham County
Median income: $104,900
FMR (2BR): $916
Fayette County
Median income: $82,500
FMR (2BR): $916
Ford County
Median income: $92,500
FMR (2BR): $916
Franklin County
Median income: $75,100
FMR (2BR): $916
Fulton County
Median income: $84,900
FMR (2BR): $916
Gallatin County
Median income: $79,500
FMR (2BR): $916
Greene County
Median income: $85,700
FMR (2BR): $992
Grundy County
Median income: $116,100
FMR (2BR): $1,459
Hamilton County
Median income: $92,100
FMR (2BR): $916
Hancock County
Median income: $90,300
FMR (2BR): $916
Hardin County
Median income: $72,700
FMR (2BR): $916
Henderson County
Median income: $84,900
FMR (2BR): $916
Henry County
Median income: $97,500
FMR (2BR): $1,143
Iroquois County
Median income: $91,100
FMR (2BR): $916
Jackson County
Median income: $85,200
FMR (2BR): $916
Jasper County
Median income: $98,800
FMR (2BR): $933
Jefferson County
Median income: $83,300
FMR (2BR): $1,026
Jersey County
Median income: $113,500
FMR (2BR): $1,218
Jo Daviess County
Median income: $99,600
FMR (2BR): $954
Johnson County
Median income: $83,800
FMR (2BR): $916
Kane County
Median income: $121,500
FMR (2BR): $1,781
Kankakee County
Median income: $102,200
FMR (2BR): $1,326
Kendall County
Median income: $135,800
FMR (2BR): $2,050
Knox County
Median income: $86,900
FMR (2BR): $916
La Salle County
Median income: $105,200
FMR (2BR): $1,079
Lake County
Median income: $121,500
FMR (2BR): $1,781
Lawrence County
Median income: $81,400
FMR (2BR): $946
Lee County
Median income: $93,100
FMR (2BR): $916
Livingston County
Median income: $96,500
FMR (2BR): $1,018
Logan County
Median income: $93,000
FMR (2BR): $988
Macon County
Median income: $95,100
FMR (2BR): $1,063
Macoupin County
Median income: $96,200
FMR (2BR): $916
Madison County
Median income: $113,500
FMR (2BR): $1,218
Marion County
Median income: $81,500
FMR (2BR): $916
Marshall County
Median income: $106,100
FMR (2BR): $1,039
Mason County
Median income: $84,100
FMR (2BR): $916
Massac County
Median income: $84,400
FMR (2BR): $969
McDonough County
Median income: $84,900
FMR (2BR): $951
McHenry County
Median income: $121,500
FMR (2BR): $1,781
McLean County
Median income: $117,000
FMR (2BR): $1,302
Menard County
Median income: $114,900
FMR (2BR): $1,203
Mercer County
Median income: $97,500
FMR (2BR): $1,143
Monroe County
Median income: $113,500
FMR (2BR): $1,218
Montgomery County
Median income: $93,600
FMR (2BR): $937
Morgan County
Median income: $91,500
FMR (2BR): $916
Moultrie County
Median income: $99,400
FMR (2BR): $916
Ogle County
Median income: $101,200
FMR (2BR): $1,118
Peoria County
Median income: $106,100
FMR (2BR): $1,039
Perry County
Median income: $82,900
FMR (2BR): $916
Piatt County
Median income: $114,300
FMR (2BR): $1,122
Pike County
Median income: $85,700
FMR (2BR): $916
Pope County
Median income: $83,300
FMR (2BR): $1,087
Pulaski County
Median income: $65,900
FMR (2BR): $916
Putnam County
Median income: $93,300
FMR (2BR): $937
Randolph County
Median income: $93,900
FMR (2BR): $916
Richland County
Median income: $84,400
FMR (2BR): $916
Rock Island County
Median income: $97,500
FMR (2BR): $1,143
Saline County
Median income: $75,000
FMR (2BR): $920
Sangamon County
Median income: $114,900
FMR (2BR): $1,203
Schuyler County
Median income: $87,800
FMR (2BR): $916
Scott County
Median income: $96,500
FMR (2BR): $916
Shelby County
Median income: $91,400
FMR (2BR): $951
St. Clair County
Median income: $113,500
FMR (2BR): $1,218
Stark County
Median income: $106,100
FMR (2BR): $1,039
Stephenson County
Median income: $86,300
FMR (2BR): $916
Tazewell County
Median income: $106,100
FMR (2BR): $1,039
Union County
Median income: $89,500
FMR (2BR): $916
Vermilion County
Median income: $82,900
FMR (2BR): $974
Wabash County
Median income: $88,100
FMR (2BR): $916
Warren County
Median income: $88,100
FMR (2BR): $916
Washington County
Median income: $99,400
FMR (2BR): $916
Wayne County
Median income: $78,700
FMR (2BR): $916
White County
Median income: $77,300
FMR (2BR): $916
Whiteside County
Median income: $90,900
FMR (2BR): $916
Will County
Median income: $121,500
FMR (2BR): $1,781
Williamson County
Median income: $95,000
FMR (2BR): $1,037
Winnebago County
Median income: $89,400
FMR (2BR): $1,175
Woodford County
Median income: $106,100
FMR (2BR): $1,039

Frequently asked questions

How many counties are in Il?

Il has 102 counties indexed in the GovCalculator dataset, sourced from HUD, IRS, and BLS public data.

Which county in Il has the highest median income?

Kendall County has the highest HUD Area Median Income in Il at $135,800 per year.

Which county in Il has the highest Fair Market Rent?

Kendall County has the highest HUD Fair Market Rent (2-bedroom) in Il at $2,050 per month.

Which county in Il is most affordable relative to income?

Effingham County has the lowest annual rent burden in Il — approximately 10.5% of median income spent on a 2-bedroom Fair Market Rent. Rent burden is calculated as (12 × FMR 2BR) ÷ Area Median Income.