| Place Name | Winchester |
| Place Type | Census Designated Place |
| ZIP Code(s) | 92596 |
| County | Riverside County |
| Area Code(s) | 951 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 2,835 |
| Population Growth Rate (2010-19) | 21.07% |
| Majority Ethnicity | Hispanic 0% |
| Metro/Micro Stats Area | Riverside-San Bernardino-Ontario, CA |
| US Congressional District(s) | California 42nd |
| State Assembly Districts | 67 |
| State Senate Districts | 28 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 41.18% |
| African American | 0.35% |
| Hispanic | 0% |
| Asian | 6.04% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 52.43% |