ZIP Code 54903 is located in Oshkosh Wisconsin. 54903 is entirely within Winnebago County. Regionally, 54903 is located in the Green Bay-Appleton Area.
| ZIP Code Name | Oshkosh |
| Primary County | Winnebago County |
| ZIP Code Type | PO Box |
| Current Time | CST |
| Coordinates | 44.01531219,-88.53663635 |
| Adjacent ZIP Codes | |
| Region | Green Bay-Appleton Area |
| Metropolitan/Micropolitan Stat Area | Oshkosh-Neenah, WI |
| Time Zone | Central Standard Time |
| IANA Timezone | America/Chicago |