# County house price index, 1990 = 100 in St. Clair County

County house price index, 1990 = 100 in St. Clair County was 249.56 index in 2025. Source: Federal Housing Finance Agency.

- Indicator id: `house_price_index_us_county_annual_1990`
- Place id: `us-county-17163`
- Unit: index
- Definition: Annual FHFA all-transactions index of single-family house prices in US counties, with 1990 equal to 100.
- Note: 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.
- Source: Federal Housing Finance Agency, 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
- License: Public domain (US government work); citation requested
- Citation: 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.
- Web page: https://invokely.ai/en/county-house-price-index-1990/st-clair-county-illinois
- CSV: https://invokely.ai/download/county-house-price-index-1990/st-clair-county-illinois.csv
- API: https://invokely.ai/api/v1/series?indicator=house_price_index_us_county_annual_1990&place=us-county-17163

| Period | index |
|---|---:|
| 2025 | 249.56 |
| 2024 | 237.01 |
| 2023 | 223.11 |
| 2022 | 203.96 |
| 2021 | 179.6 |
| 2020 | 164.74 |
| 2019 | 161.39 |
| 2018 | 156.57 |
| 2017 | 154.52 |
| 2016 | 148.68 |
| 2015 | 147.41 |
| 2014 | 144.57 |
| 2013 | 146.02 |
| 2012 | 147.91 |
| 2011 | 152.05 |
| 2010 | 156.43 |
| 2009 | 161.52 |
| 2008 | 166.55 |
| 2007 | 169.11 |
| 2006 | 167.58 |
| 2005 | 160.38 |
| 2004 | 149.82 |
| 2003 | 141.53 |
| 2002 | 137.8 |
| 2001 | 132.36 |
| 2000 | 126.33 |
| 1999 | 120.64 |
| 1998 | 118.05 |
| 1997 | 115.89 |
| 1996 | 113.1 |
| 1995 | 109.61 |
| 1994 | 106.82 |
| 1993 | 103.83 |
| 1992 | 103.32 |
| 1991 | 102.07 |
| 1990 | 100 |
| 1989 | 100.47 |
| 1988 | 98.73 |
| 1987 | 98.4 |
| 1986 | 96.38 |
| 1985 | 94.91 |
| 1984 | 90.9 |
| 1983 | 87.79 |
| 1982 | 93.61 |
| 1981 | 76.86 |
| 1980 | 83.75 |
| 1979 | 82.22 |
| 1978 | 67.07 |
| 1977 | 60.27 |