ZIP Codes in New Berlin, WI
New Berlin uses 2 ZIP codes, all in Waukesha County. Pick one below for details, or look up the full nine-digit ZIP+4 for a specific street address.
All 2 New Berlin ZIP codes
| ZIP | Type | County | Population |
|---|---|---|---|
| 53146 | standard | Waukesha | 7,285 |
| 53151 | standard | Waukesha | 32,824 |
Finding a ZIP+4 in New Berlin
Knowing which of these 2 ZIP codes covers an address only gets you partway. The four-digit extension identifies the specific delivery point — typically one side of one block. Two houses facing each other on the same New Berlin street almost always have different ZIP+4 codes even though they share all five leading digits.
Appending ZIP+4 to a mailing list?
Upload a CSV of New Berlin addresses and download it complete.