# County house price index, 1990 = 100 in Williamson County

County house price index, 1990 = 100 in Williamson County was 558.37 index in 2025. Source: Federal Housing Finance Agency.

- Indicator id: `house_price_index_us_county_annual_1990`
- Place id: `us-county-48491`
- 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/williamson-county-texas
- CSV: https://invokely.ai/download/county-house-price-index-1990/williamson-county-texas.csv
- API: https://invokely.ai/api/v1/series?indicator=house_price_index_us_county_annual_1990&place=us-county-48491

| Period | index |
|---|---:|
| 2025 | 558.37 |
| 2024 | 564.22 |
| 2023 | 572.86 |
| 2022 | 606.99 |
| 2021 | 486.53 |
| 2020 | 389.72 |
| 2019 | 369.33 |
| 2018 | 344.93 |
| 2017 | 326.51 |
| 2016 | 305.96 |
| 2015 | 279.47 |
| 2014 | 255.6 |
| 2013 | 228.87 |
| 2012 | 217.28 |
| 2011 | 214.4 |
| 2010 | 219.24 |
| 2009 | 222.34 |
| 2008 | 223.8 |
| 2007 | 218.84 |
| 2006 | 203.9 |
| 2005 | 192.33 |
| 2004 | 188.04 |
| 2003 | 191.03 |
| 2002 | 191.65 |
| 2001 | 190.32 |
| 2000 | 176.67 |
| 1999 | 159.07 |
| 1998 | 151.6 |
| 1997 | 147.23 |
| 1996 | 146.95 |
| 1995 | 143.97 |
| 1994 | 139.15 |
| 1993 | 130.11 |
| 1992 | 116.91 |
| 1991 | 110.12 |
| 1990 | 100 |
| 1989 | 101.97 |
| 1988 | 130.52 |
| 1987 | 127.78 |
| 1986 | 139.1 |
| 1985 | 136.6 |
| 1984 | 125.94 |
| 1983 | 113.07 |
| 1982 | 101.74 |
| 1981 | 94.41 |
| 1980 | 90.1 |
| 1979 | 83.23 |
| 1978 | 72.66 |
| 1977 | 59.13 |
| 1976 | 52.91 |
| 1975 | 47.78 |