postalup/us-zip-code-rankings-demographics-acs-2023

US ZIP Code Rankings & Demographics (Census ACS 2023)

Clean, ready-to-use rankings and demographics for US ZIP codes, derived from the US Census Bureau American Community Survey (2019–2023 5-year estimates) and USPS ZIP→city/state mapping.

Maintained by [PostalUp](https://postalup.com) — US postal & address data. Live, always-current versions of every ranking below:

• —Richest ZIP codes → https://postalup.com/richest-zip-codes
• —Poorest ZIP codes → https://postalup.com/poorest-zip-codes
• —Largest ZIP codes by area → https://postalup.com/largest-zip-codes
• —Fastest-growing ZIP codes → https://postalup.com/fastest-growing-zip-codes
• —ZIP codes by income → https://postalup.com/zip-codes-by-income
• —ZIP codes by population → https://postalup.com/zip-codes-by-population

Files

Methodology & honest caveats

• —Source: US Census Bureau ACS 2019–2023 5-year estimates (ZCTA level) + USPS city/state. ZIP Code Tabulation Areas (ZCTAs) approximate USPS ZIP codes.
• —Income is top-coded. The ACS caps published median household income at $250,001 — any ZIP above that reads 250001 (income_top_coded = true in richest_zip_codes.csv). We do not invent figures above the cap; tied ZIPs are ordered by bachelor's-degree rate, then home-ownership rate, then population.
• —Suppressed income excluded. Some ZCTAs report a 0 / unavailable median income (data not published, not a real $0). The poorest ranking excludes these and requires ≥ 1,000 households; poverty rate is shown for corroboration.
• —Growth is the change between overlapping ACS 5-year estimates (2021 vs 2023) — a smoothed multi-year trend, not a single-year rate. Minimum base population 2,000 (small bases inflate percentages).

License

CC BY 4.0. Free to use, including commercially — attribution required: credit PostalUp (https://postalup.com). Need a commercial-license file with USPS-enriched ZIP+4, monthly refreshes, and more formats (CSV/JSON/SQL/Parquet)? See https://postalup.com/downloads.