Random ZIP Code Generator
Generate random USA ZIP codes — the American postal code — by state. Choose a state and quantity, then copy the five-digit codes or download CSV and JSON. Free, no sign-up.
Updated
97215Portland, Oregon (OR)
30327Atlanta, Georgia (GA)
03109Manchester, New Hampshire (NH)
This random ZIP code generator selects five-digit US codes from the site’s configured postal dataset. Each result shows its associated city and state separately. Copy one code or use Copy all for one ZIP per line, ready to paste into test data without removing a state name.
Choose a state or leave Random, set a quantity up to 100, and press Generate ZIP code. Changing a selector applies to your next batch. CSV and JSON exports keep zip, state, stateCode and city in separate fields. A batch can contain repeats.
The codes come from the GeoNames-derived postal lists used by our address generator, filtered for ordinary street delivery. Each state uses a configured city and its ZIP pool, so this is not a complete or uniformly sampled directory of every US ZIP. The methodology explains the data sources and limits.
Use these as sample ZIP codes for forms, demos and QA. An existing postal code does not verify a street address or guarantee acceptance by a validation service. For a ZIP with matching street and city fields, use the random address generator.
ZIP code output fields
| Field | Example | How to use it |
|---|---|---|
| zip | 02108 | Keep as text so the leading zero survives. |
| state | Massachusetts | Display name of the selected state. |
| stateCode | MA | Two-letter state code for a separate form field. |
| city | Boston | Configured locality associated with the ZIP pool. |
Copy actions return only the ZIP. CSV and JSON exports include the geographic context in separate columns.
Random ZIP codes by state
Use the State selector above for one state’s codes, or Random to let each record choose a state. The selector includes the 50 states and the District of Columbia. It stays on this page, so you can generate and export postal fields without opening a full address tool.
The city shown beside each code identifies the configured locality used for that state. A state filter does not sample every city in that state. For example, the Ohio configuration uses Columbus and Delaware uses Wilmington. For statewide coverage and prefix patterns, see our US ZIP code statistics.
Keep leading zeros in ZIP codes
A ZIP code is a five-character postal identifier, not a number to calculate with. Copying 02108 must preserve the initial zero. This tool copies the original string, and its JSON export stores the zip field as a string.
CSV also contains the five digits, but spreadsheet software may automatically interpret that column as numeric. Import the zip column as Text to retain leading zeros. If you need negative fixtures, create deliberately malformed strings separately; this generator samples the configured postal list.
ZIP+4: what the extra four digits mean
A ZIP+4 adds four digits after a hyphen to identify a more specific delivery segment. This tool generates five-digit ZIP codes only. It does not generate or look up the correct four-digit extension for an address.
For a real address’s ZIP+4, use the USPS ZIP Code Lookup linked in Sources. For test forms that accept both formats, add separate five-digit and hyphenated nine-digit fixtures according to your application’s requirements. A random extension would not verify a delivery point.
US postcode vs postal codes outside the US
In the United States the postal code is called a ZIP code, so a US postcode generator and a US postal code generator are the same tool as this one — the five-digit code above is the American postal code. The word “postcode” is the British and Australian term, and “postal code” the Canadian one, but all three name the same field on a form.
This tool is for US ZIP codes. Other countries have different postal formats. Use a country generator or a city page such as London, Toronto or Sydney for a local address and postal code. The worldwide postal code guide explains the format differences.
Frequently asked questions
Are these ZIP codes real?
They are drawn from the configured GeoNames-derived postal lists, rather than assembled from random digits. The lists are a snapshot, not a live USPS lookup. A code can identify a real postal area; generating it does not verify any street address or recipient.
Can I generate ZIP codes for a specific state?
Yes. Select a state above, choose the quantity and generate. Results come from that state’s configured city ZIP pool. The tool does not sample every ZIP in the state.
Does Copy include the state name?
No. Copy returns only the five-digit ZIP, including any leading zero. Copy all puts one ZIP per line. The city and state remain visible beside each code, and exports place them in separate fields.
Can I use this as a fake ZIP code generator for testing?
Yes. Use the sampled codes as test inputs for forms and fixtures. They are existing codes in the configured dataset, so they may identify real postal areas. They do not guarantee that an address validator will accept other fields you combine with them.
Is a US ZIP code the same as a postcode?
Yes — they are the same form field under different names. The United States calls its postal code a ZIP code (five digits, such as 02108); the United Kingdom and Australia call theirs a postcode, and Canada a postal code. So a US postcode generator, a US postal code generator and this random ZIP code generator all produce the same five-digit American value.
Does this work as an American ZIP code generator for the whole USA?
Yes. Leave the State selector on Random to draw codes from across the USA, or pick one of the 50 states or the District of Columbia to restrict a batch. Every code comes from the configured United States postal dataset, so the output is always an American ZIP code rather than an invented five-digit number.
Can I generate ZIP+4 or international postal codes?
This tool generates five-digit US ZIP codes. Use USPS lookup for a real address’s ZIP+4, or a country address generator for another country’s postal format.
Is the ZIP code generator free?
Yes. Generate up to 100 codes per batch, copy them and download CSV or JSON without an account. You can generate another batch whenever needed; results may repeat.
Related pages
More generators
Sources
- USPS — ZIP Code lookup and format — United States Postal Service
- GeoNames — Postal code data — GeoNames