US ZIP codes by state
ZIP codes follow postal delivery routes, not state borders — but counting them by state still shows how unevenly the country is served. Texas and California hold a large share of all ZIP codes; a handful of states hold very few. 41,192 ZIP codes55 states
Key findings
- Texas has the most ZIP codes (2,600), followed by California (2,593) and Pennsylvania (2,176).
- The top five states account for 26.9% of all ZIP codes in the dataset.
- At the other end, American Samoa has 1 ZIP codes.
ZIP codes by state
| State | ZIP codes | Share |
|---|---|---|
| Texas | 2,600 | 6.3% |
| California | 2,593 | 6.3% |
| Pennsylvania | 2,176 | 5.3% |
| New York | 2,154 | 5.2% |
| Illinois | 1,575 | 3.8% |
| Florida | 1,473 | 3.6% |
| Ohio | 1,416 | 3.4% |
| Virginia | 1,214 | 2.9% |
| Michigan | 1,159 | 2.8% |
| Missouri | 1,157 | 2.8% |
| North Carolina | 1,081 | 2.6% |
| Iowa | 1,055 | 2.6% |
| Minnesota | 992 | 2.4% |
| Indiana | 968 | 2.3% |
| Georgia | 952 | 2.3% |
Why ZIP counts differ
ZIP codes are assigned where mail is delivered, so a densely populated state with many distinct delivery areas has more of them. Rural states can cover huge areas with relatively few codes, and some codes span state lines. A high ZIP count does not mean a state is larger or busier — just that its postal geography is more finely divided.
Method
Count of unique ZIP codes per state from the US ZIP code dataset (Census/GeoNames-derived), which lists one primary state per code. Data: public domain / CC BY 4.0.