Data / Rankings / County house price index, 1990 = 100 / Counties in Illinois

Counties in Illinois by county house price index, 1990 = 100

Fayette County had the highest county house price index, 1990 = 100 of 55 counties in 2021, at 257.9 index. Stephenson County had the lowest, at 168.16 index. The median was 204.04 index. Source: the Federal Housing Finance Agency.

Highest257.9Fayette County
Lowest168.16Stephenson County
Median204.0455 counties

All counties, 2021

CSVChart (SVG)

Fayette CountyFayette County: 257.9 index257.9Adams CountyAdams County: 251.27 index251.27Franklin CountyFranklin County: 241.03 index241.03Henry CountyHenry County: 240.74 index240.74Fulton CountyFulton County: 237.63 index237.63Rock Island CountyRock Island County: 235.1 index235.1Ford CountyFord County: 234.93 index234.93Douglas CountyDouglas County: 227.58 index227.58Macoupin CountyMacoupin County: 226.55 index226.55Christian CountyChristian County: 225.67 index225.67Woodford CountyWoodford County: 225.16 index225.16Tazewell CountyTazewell County: 224.15 index224.15DuPage CountyDuPage County: 223.56 index223.56Clinton CountyClinton County: 223.47 index223.47Monroe CountyMonroe County: 223.26 index223.26Cook CountyCook County: 219.79 index219.79Grundy CountyGrundy County: 219.42 index219.42Marion CountyMarion County: 216.48 index216.48Piatt CountyPiatt County: 216.15 index216.15Knox CountyKnox County: 215.84 index215.84Jo Daviess CountyJo Daviess County: 213.35 index213.35Williamson CountyWilliamson County: 210.75 index210.75Madison CountyMadison County: 210.2 index210.2LaSalle CountyLaSalle County: 206.07 index206.07Kankakee CountyKankakee County: 205.45 index205.45Whiteside CountyWhiteside County: 204.54 index204.54Livingston CountyLivingston County: 204.36 index204.36Montgomery CountyMontgomery County: 204.04 index204.04Champaign CountyChampaign County: 204.03 index204.03Will CountyWill County: 203.51 index203.51McDonough CountyMcDonough County: 200.67 index200.67McLean CountyMcLean County: 200.62 index200.62Lee CountyLee County: 200.14 index200.14Logan CountyLogan County: 196.75 index196.75Bureau CountyBureau County: 195.69 index195.69De Witt CountyDe Witt County: 195.38 index195.38Ogle CountyOgle County: 195.25 index195.25Kendall CountyKendall County: 194.44 index194.44Jersey CountyJersey County: 194.15 index194.15Kane CountyKane County: 193.95 index193.95Peoria CountyPeoria County: 191.28 index191.28Jefferson CountyJefferson County: 190.05 index190.05Coles CountyColes County: 189.5 index189.5Morgan CountyMorgan County: 187.26 index187.26DeKalb CountyDeKalb County: 183.87 index183.87Jackson CountyJackson County: 183.38 index183.38Lake CountyLake County: 180.68 index180.68St. Clair CountySt. Clair County: 179.6 index179.6Sangamon CountySangamon County: 178.94 index178.94Vermilion CountyVermilion County: 178.74 index178.74Macon CountyMacon County: 177.83 index177.83Boone CountyBoone County: 177.75 index177.75McHenry CountyMcHenry County: 177.63 index177.63Winnebago CountyWinnebago County: 172.51 index172.51Stephenson CountyStephenson County: 168.16 index168.16
index. Source: FHFA. Retrieved 2026-10-10.

Full ranking

RankCounties2021
index		Change on 2020
1Fayette County257.9+16.93
2Adams County251.27+15.72
3Franklin County241.03+19.55
4Henry County240.74+15.1
5Fulton County237.63+14.72
6Rock Island County235.1+15.37
7Ford County234.93+19.49
8Douglas County227.58+11.49
9Macoupin County226.55+13.45
10Christian County225.67+9.28
11Woodford County225.16+11.79
12Tazewell County224.15+12.07
13DuPage County223.56+13.49
14Clinton County223.47+13.73
15Monroe County223.26+16.26
16Cook County219.79+14.73
17Grundy County219.42+15.68
18Marion County216.48+13.79
19Piatt County216.15+16.16
20Knox County215.84+11.22
21Jo Daviess County213.35+12.94
22Williamson County210.75+16.68
23Madison County210.2+14.49
24LaSalle County206.07+16.35
25Kankakee County205.45+17.32
26Whiteside County204.54+9.89
27Livingston County204.36+11.37
28Montgomery County204.04+13.79
29Champaign County204.03+15.79
30Will County203.51+18.29
31McDonough County200.67+7.26
32McLean County200.62+17.05
33Lee County200.14+9.26
34Logan County196.75+12.05
35Bureau County195.69+16.5
36De Witt County195.38+16.06
37Ogle County195.25+19.3
38Kendall County194.44+17.5
39Jersey County194.15+10.11
40Kane County193.95+16.98
41Peoria County191.28+11.25
42Jefferson County190.05+13.65
43Coles County189.5+14.54
44Morgan County187.26+9.73
45DeKalb County183.87+17.68
46Jackson County183.38+14.4
47Lake County180.68+13.83
48St. Clair County179.6+14.86
49Sangamon County178.94+9.45
50Vermilion County178.74+13.39
51Macon County177.83+11.33
52Boone County177.75+19.15
53McHenry County177.63+16.62
54Winnebago County172.51+19.62
55Stephenson County168.16+8.69

Other periods

About this ranking

Annual FHFA all-transactions index of single-family house prices in US counties, with 1990 equal to 100.

Developmental nominal index, not seasonally adjusted. Uses sale prices and refinance appraisals for mortgages purchased or guaranteed by Fannie Mae or Freddie Mac. Differs from purchase-only indexes. Missing estimates and unavailable base-year values remain absent. Historical estimates can be revised.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

Federal Housing Finance Agency (FHFA). FHFA developmental all-transactions county house price index, annual, nominal, not seasonally adjusted, 1990 = 100. https://www.fhfa.gov/hpi/download/annual/hpi_at_county.xlsx. Retrieved 2026-10-10.

Use this data in your AI agent

Invokely serves this figure to AI assistants through MCP and to code through a REST API, with the source and citation attached. Ask your assistant:

Rank Counties in Illinois by county house price index, 1990 = 100 using official data, and cite the source.
rank_places {"indicator":"house_price_index_us_county_annual_1990","level":"province","within":"Illinois","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=house_price_index_us_county_annual_1990&level=province&within=Illinois&limit=10

Connect Claude, ChatGPT or Cursor in one step. The trial answers 25 calls a day without an account.

Questions

Which county has the highest county house price index, 1990 = 100?

Fayette County, with 257.9 index in 2021, according to the Federal Housing Finance Agency.

Which county has the lowest county house price index, 1990 = 100?

Stephenson County, with 168.16 index in 2021.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: Federal Housing Finance Agency, FHFA developmental all-transactions county house price index, annual, nominal, not seasonally adjusted, 1990 = 100. Retrieved 2026-10-10.

County house price index, 1990 = 100: other rankings

Counties in Illinois: more rankings