| Place Name | Winchester |
| Place Type | City |
| ZIP Code(s) | 83555 |
| County | Lewis County |
| Area Code(s) | 208 |
| Timezone | Pacific Daylight Time (PDT) |
| Population (2022) | 306 |
| Population Growth Rate (2010-19) | 4.71% |
| Majority Ethnicity | White 92.37% |
| US Congressional District(s) | Idaho 1st |
| State House Districts | 6 |
| State Senate Districts | 6 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 92.37% |
| African American | 0.85% |
| Hispanic | 2.54% |
| Asian | 0% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 4.24% |