| Place Name | New Castle |
| Place Type | Town |
| County | Westchester County |
| Area Code(s) | 914 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 18,170 |
| Majority Ethnicity | White 83.7% |
| Metro/Micro Stats Area | New York-Newark-Jersey City, NY-NJ-PA |
| US Congressional District(s) | New York 17thNew York 18th |
| State Assembly Districts | 93 |
| State Senate Districts | 40 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 83.7% |
| African American | 4.34% |
| Hispanic | 0.06% |
| Asian | 8.01% |
| Native American | 0.03% |
| Hawaiin/Pacific Islander | 3.86% |