Oak Brook zipcode
| City | Oak Brook |
| ZIP Code | 60523 |
| Type | Standard |
| State Code | IL |
| State | Illinois |
ZIP code of Oak Brook is 60523. This place is located in Illinois state in US. To send any postal service to Oak Brook, you must use 60523 zipcode.
The ZIP code 60523 is also used with 1 more city name of Illinois.
- Hinsdale, IL