National rankings · ACS 5-Year
U.S. ZIP Code Rankings by State
Every state ranked by total ZIP-area population and by ZIP-code count — computed live from ZIP-level Census data, no hand-curated lists.
- 33,099
- ZIP codes ranked
- 52
- States + territories
- Texas
- Most ZIPs (1,935)
The verdict
ZIP coverage tracks delivery geography, not population: Texas leads with 1,935 ZIP codes, and just three states hold roughly 17% of every ZIP in the country — while California tops the population ranking.
- Texas
- most ZIPs (1,935)
- California
- most people (37,249,464)
- 17%
- of all ZIPs in the top 3 states
- 312,447,629
- people across all ZIPs
Coverage follows USPS delivery routes — one ZCTA per delivery cluster — so geographically broad states lead by count even where populations don't.
According to the U.S. Census Bureau American Community Survey (2019–2023 5-Year Estimates), the United States spans 33,099 ZIP Code Tabulation Areas across 52 states and territories, home to roughly 312,447,629 residents. PlainZIP aggregates every ZIP-level record into the state rankings below — every row is a live SQL query, not a hand-curated list. See our methodology for how ZIP-level Census data is rolled up into state totals. Data refreshed March 2026.
Top 25 states by total ZIP-area population
Top 25 states by ZIP-code count
Source: U.S. Census Bureau ACS 5-Year Estimates (2023) and HUD-USPS ZIP crosswalk. Verify with HUD →