Data sources
Site data built 2026-10-22.
Every number on the site comes from the files below. We keep a copy of each with its download date and a SHA-256 checksum, so any figure can be traced back and reproduced. We do not use crowdsourced prices or scraped websites.
Regional Price Parities by metropolitan area (MARPP)
Publisher: U.S. Bureau of Economic Analysis (BEA). Source page · Direct download
Release: Last updated February 19, 2026: new statistics for 2024; revised statistics for 2008-2023.
Terms: U.S. federal government statistics; public domain. Cite BEA as the source.
| File | Downloaded | Size | SHA-256 (first 16) |
|---|---|---|---|
| MAIRPD_MSA_2008_2024.csv | 2026-10-21 | 95 KB | 1c71e4734648d023 |
| MARPP_MSA_2008_2024.csv | 2026-10-21 | 445 KB | 4ce7a7e2ea08ff72 |
Regional Price Parities and real personal income by state (SARPP, SARPI)
Publisher: U.S. Bureau of Economic Analysis (BEA). Source page · Direct download
Release: Last updated February 19, 2026: new statistics for 2024; revised statistics for 2008-2023.
Terms: U.S. federal government statistics; public domain. Cite BEA as the source.
| File | Downloaded | Size | SHA-256 (first 16) |
|---|---|---|---|
| SAIRPD_STATE_2008_2024.csv | 2026-10-21 | 11 KB | 82df090a8fb64b3d |
| SARPI_STATE_2008_2024.csv | 2026-10-21 | 52 KB | 52d8f9d0edafc390 |
| SARPP_STATE_2008_2024.csv | 2026-10-21 | 50 KB | 9c0cbbf81061b672 |
Zillow Observed Rent Index (ZORI), all homes plus multifamily, smoothed, metro
Publisher: Zillow Group. Source page · Direct download
Terms: Zillow Terms of Use allow displaying derivative works of Zillow's aggregate data (e.g. in a graph) if Zillow is cited on every page where the data appears ('Data Provided by Zillow Group'), without Zillow logos and without implying any relationship beyond Zillow being the source.
| File | Downloaded | Size | SHA-256 (first 16) |
|---|---|---|---|
| zori.csv | 2026-10-21 | 1.1 MB | 1397d89685ad547c |
Zillow Home Value Index (ZHVI), all homes, middle tier (35th-65th percentile), smoothed and seasonally adjusted, metro
Publisher: Zillow Group. Source page · Direct download
Terms: Same as ZORI.
| File | Downloaded | Size | SHA-256 (first 16) |
|---|---|---|---|
| zhvi.csv | 2026-10-21 | 4.5 MB | f921b1a98ae8b14a |
Weekly retail gasoline prices, regular grade, all formulations (dollars per gallon)
Publisher: U.S. Energy Information Administration (EIA). Source page · Direct download
Release: Weekly survey of retail prices on Mondays, released on Mondays or Tuesdays. The site also re-reads the latest-weeks table several times a day.
Terms: U.S. federal government statistics; public domain. Cite EIA as the source.
| File | Downloaded | Size | SHA-256 (first 16) |
|---|---|---|---|
| history-NUS.htm | 2026-10-21 | 193 KB | b36a1a5d5351aa45 |
| history-R10.htm | 2026-10-21 | 184 KB | 8bfae1cbd43e7645 |
| history-R1X.htm | 2026-10-21 | 180 KB | 34516e23894ef4ef |
| history-R1Y.htm | 2026-10-21 | 180 KB | 0c1e5e7091b51cb6 |
| history-R1Z.htm | 2026-10-21 | 180 KB | 8d0ad6c74be09c82 |
| history-R20.htm | 2026-10-21 | 184 KB | c550b4b7b5a956ac |
And 24 more files from the same download, listed with checksums in the project's data manifest.
US state boundaries for maps (us-atlas 3.0.1, states-albers-10m)
Publisher: Mike Bostock, from U.S. Census Bureau cartographic boundary files. Source page · Direct download
Release: Census Bureau 2017 cartographic boundaries (1:10,000,000), projected to Albers USA with Alaska and Hawaii insets.
Terms: us-atlas is ISC-licensed; the underlying Census Bureau boundaries are public domain.
| File | Downloaded | Size | SHA-256 (first 16) |
|---|
How we use them
See the methodology for every formula, how Zillow areas are matched to BEA metro areas, and what the data leave out.
Sources we do not use
Crowdsourced price sites, scraped listing pages and paid item-price surveys. They cover items we cannot verify or license. That is why the site has no prices for single items such as a meal or a haircut.