| Place Name | Killingworth |
| Place Type | Town |
| ZIP Code(s) | 06419 |
| County | Middlesex County |
| Area Code(s) | 860,959 |
| Timezone | Eastern Daylight Time (EDT) |
| Population (2021) | 6,276 |
| Majority Ethnicity | White 96.1% |
| Metro/Micro Stats Area | Hartford-East Hartford-Middletown, CT |
| US Congressional District(s) | Connecticut 2nd |
| State House Districts | 35 |
| State Senate Districts | 12 |
| Race/Ethnicy | Percentage of Population (2021) |
|---|---|
| White | 96.1% |
| African American | 0% |
| Hispanic | 0% |
| Asian | 1.53% |
| Native American | 0% |
| Hawaiin/Pacific Islander | 2.37% |