| ZIP Code | ZIP Code Place Name | County | ZIP Code Type |
|---|---|---|---|
| 54901 | Oshkosh | Winnebago County | Standard |
| 54902 | Oshkosh | Winnebago County | Standard |
| 54903 | Oshkosh | Winnebago County | PO Box |
| 54904 | Oshkosh | Winnebago County | Standard |
| 54906 | Oshkosh | Winnebago County | Unique |
| 54923 | Berlin | Waushara County | Standard |
| 54927 | Butte Des Morts | Winnebago County | PO Box |
| 54940 | Fremont | Waupaca County | Standard |
| 54947 | Larsen | Winnebago County | Standard |
| 54952 | Menasha | Calumet County | Standard |
| 54956 | Neenah | Winnebago County | Standard |
| 54957 | Neenah | Winnebago County | PO Box |
| 54963 | Omro | Winnebago County | Standard |
| 54964 | Pickett | Winnebago County | Standard |
| 54971 | Ripon | Fond Du Lac County | Standard |
| 54979 | Van Dyne | Fond Du Lac County | Standard |
| 54980 | Waukau | Winnebago County | PO Box |
| 54985 | Winnebago | Winnebago County | PO Box |
| 54986 | Winneconne | Winnebago County | Standard |