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 — US postal & address data. Live, always-current versions of every ranking:

Richest ZIP codes

Poorest ZIP codes

Largest ZIP codes by area

Fastest-growing ZIP codes

ZIP codes by income

ZIP codes by population

Files

us_zip_demographics_acs_2023.csv — ~33,772 rows: full ACS 2023 demographics per ZIP (ZCTA)

richest_zip_codes.csv — top 50 by median household income

poorest_zip_codes.csv — bottom 50 by median income (+ poverty rate)

largest_zip_codes_by_area.csv — top 50 by land area (sq mi)

fastest_growing_zip_codes.csv — top 50 by 2021→2023 population growth

richest_zip_per_state.csv — highest-income ZIP per state/territory

Methodology & honest caveats

Source: US Census Bureau ACS 2019–2023 5-year estimates (ZCTA level) + USPS city/state. ZCTAs approximate USPS ZIP codes.

Income is top-coded at $250,001 by the ACS (income_top_coded=true flags these).

Suppressed income excluded from the poorest ranking (median income > 0 and ≥ 1,000 households).

Growth compares overlapping ACS 5-year estimates (2021 vs 2023) — a smoothed trend, not a single-year rate.

License: CC BY 4.0. Free to use, including commercially — attribution required: credit PostalUp (https://postalup.com). For USPS-enriched ZIP+4, monthly refreshes, and more formats (CSV/JSON/SQL/Parquet), see postalup.com/downloads.