| Place Name | Elwood |
| Place Type | Census Designated Place |
| ZIP Code(s) | 11731 11740 11743 |
| County | Suffolk County |
| Area Code(s) | 631,934 |
| Timezone | Eastern Standard Time (EST) |
| Population (2022) | 10,821 |
| Population Growth Rate (2010-19) | 2.23% |
| Majority Ethnicity | White 79.48% |
| Metro/Micro Stats Area | New York-Newark-Jersey City, NY-NJ-PA |
| US Congressional District(s) | New York 3rd |
| State Assembly Districts | 10,12 |
| State Senate Districts | 2,5 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 79.48% |
| African American | 6.53% |
| Hispanic | 0% |
| Asian | 5.52% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 8.48% |