ZIP CodesZIP codes in Winnebago County, Wisconsin
Winnebago County, Wisconsin has 16 ZIP codes in this list, from 54901 to 54986. They cover 11 places, among them Oshkosh, Neenah, Butte Des Morts and Eureka.
Nothing in this county matches.
| ZIP code | Place | Land area (sq mi) | Map point |
|---|---|---|---|
| 54901 | Oshkosh | 16.6 | 44.022, -88.544 |
| 54902 | Oshkosh | 35.0 | 43.995, -88.526 |
| 54903 | Oshkosh | no area | 44.069, -88.645 |
| 54904 | Oshkosh | 77.9 | 44.030, -88.607 |
| 54906 | Oshkosh | no area | 44.069, -88.645 |
| 54927 | Butte Des Morts | 0.2 | 44.103, -88.654 |
| 54934 | Eureka | no area | 44.003, -88.840 |
| 54947 | Larsen | 46.5 | 44.198, -88.696 |
| 54952 | Menasha | 28.1 | 44.211, -88.418 |
| 54956 | Neenah | 61.7 | 44.181, -88.479 |
| 54957 | Neenah | no area | 44.186, -88.463 |
| 54963 | Omro | 76.1 | 44.036, -88.752 |
| 54964 | Pickett | 34.5 | 43.901, -88.713 |
| 54980 | Waukau | 0.3 | 43.989, -88.771 |
| 54985 | Winnebago | 0.1 | 44.071, -88.518 |
| 54986 | Winneconne | 29.0 | 44.119, -88.721 |
The ZIP code areas of Winnebago County add up to about 406 square miles of land (1,052 sq km) as the Census Bureau draws them. The largest is 54904 (Oshkosh), with 77.9 square miles.
Places with more than one code here: Oshkosh (5 codes), Neenah (2 codes).
Using these codes
- In an address, the ZIP code comes last, after the city and the two-letter state: Oshkosh, WI 54901.
- Tap a ZIP code to open it in the look-up, with a copy button for the address line.
- A code can cross a county line, and one town can have several codes. The table shows the main place of each code.
- "No area" means the Census Bureau draws no area for that code. Such codes are usually for post office boxes or a single building.
Places and counties: GeoNames. Areas: U.S. Census Bureau, 2024 ZIP Code Tabulation Areas. Checked in November 2026. This site is not connected with the United States Postal Service; for mailing, confirm the address with USPS.