| Place Name | Winchester |
| Place Type | Census Designated Place |
| ZIP Code(s) | 01890 |
| County | Middlesex County |
| Area Code(s) | 339,781 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 21,437 |
| Population Growth Rate (2010-19) | 7.47% |
| Majority Ethnicity | White 79.75% |
| Metro/Micro Stats Area | Boston-Cambridge-Newton, MA-NH |
| US Congressional District(s) | Massachusetts 5th |
| State House Districts | 31st Middlesex |
| State Senate Districts | Second Middlesex,Fifth Middlesex |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 79.75% |
| African American | 1.86% |
| Hispanic | 0.34% |
| Asian | 15.81% |
| Native American | 0.03% |
| Hawaiin/Pacific Islander | 2.21% |