| Place Name | Winnetka |
| Place Type | Unincorporated |
| ZIP Code(s) | 91306 |
| County | Los Angeles County |
| Area Code(s) | 747,818 |
| Timezone | Pacific Daylight Time (PDT) |
| Population () | |
| Metro/Micro Stats Area | Los Angeles-Long Beach-Anaheim, CA |
| US Congressional District(s) | California 32nd |
| State Assembly Districts | 46 |
| State Senate Districts | 20 |