Browse ZIP Code Data
Every browsing path below leads to the same underlying dataset — roughly 33,000 ZIP Code Tabulation Areas from the U.S. Census Bureau American Community Survey 5-Year Estimates (2023). Choose the entry point that matches your question.
Top 15 states by ZIP-code count
PlainZIP indexes 33,099 ZIP codes across 52 states. The most populous and ZIP-dense states are surfaced below — click any state to see its full ZIP coverage.
- Texas 1,935 ZIPs · 25,144,800 pop
- Pennsylvania 1,795 ZIPs · 12,702,102 pop
- New York 1,794 ZIPs · 19,378,077 pop
- California 1,761 ZIPs · 37,249,464 pop
- Illinois 1,383 ZIPs · 12,830,581 pop
- Ohio 1,195 ZIPs · 11,535,123 pop
- Missouri 1,022 ZIPs · 5,989,092 pop
- Michigan 986 ZIPs · 9,883,612 pop
- Florida 983 ZIPs · 18,801,226 pop
- Iowa 934 ZIPs · 3,046,945 pop
- Virginia 896 ZIPs · 8,001,239 pop
- Minnesota 884 ZIPs · 5,304,096 pop
- North Carolina 808 ZIPs · 9,535,477 pop
- Indiana 775 ZIPs · 6,483,792 pop
- Wisconsin 772 ZIPs · 5,686,814 pop
What you can and cannot browse here
Coverage status, in plain language: every ZIP Code Tabulation Area (ZCTA) published by the Census Bureau is present in this directory. That includes ZIPs in the 50 states, the District of Columbia, and the five inhabited U.S. territories. ZIPs that are PO-box-only or otherwise unmapped by the Census Bureau are not present, because those ZIPs do not have populated demographic, income, or housing fields. Every count, percentage, or aggregate you see on a browse page can be reconstructed by running the corresponding SQL query against PlainZIP's underlying database.
You can browse alphabetically (cities A–Z), geographically (state → county → ZIP), chronologically (time zone), or by computed metric (rankings, scorecards). All paths terminate at the same ZIP-level detail page, so it doesn't matter where you start — choose whichever entry point matches how you think about the question. Researchers benchmarking statewide demographics tend to start at states; relocation planners typically open the dashboard or scorecard; logistics teams favor the timezone view.
The browse paths above are deliberately narrow. We do not publish editorial "best of" lists, opinion rankings, or analyst commentary on this coverage hub. Rankings exist only where they can be reconstructed by a SQL aggregate (e.g., "states by total ZIP-area population"); they do not attempt to imply quality, livability, or desirability — only quantitative position in the underlying Census dataset. For deeper interpretation, see the guides.
Methodology
Every browse path draws from the same underlying data pipeline. ZIP-level demographic, income, housing, and education fields come from the U.S. Census Bureau American Community Survey 5-Year Estimates (2023), pulled directly from the Census Bureau API for all ZIP Code Tabulation Areas (ZCTAs). ZIP-to-county and ZIP-to-city mappings come from the HUD USPS Crosswalk and simplemaps coordinate files.
Counties, cities, and time zones are derived views — they aggregate the same ZIP records rather than pulling independent source data. That means numbers reconcile cleanly across views: summing ZIP populations inside a county equals the county total, because the county total is computed by that same aggregation.
No proprietary scoring, editorial adjustment, or estimation is applied to raw fields. Percentile rankings and scorecard composite grades are computed from the raw Census values using published formulas documented on each detail page. For the full data-sources list and ETL pipeline, see the full methodology page.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Source: HUD USPS Crosswalk. Source: simplemaps.com ZIP database.