Township in Lower Connecticut River Valley Planning Region County, Connecticut · 35.3 sq mi · 178 people per sq mi
About 6,300 people live in Killingworth. The typical household earns $140,655, and the median resident is 53.3 years old.
2026 projection
From 6,160 in 2020
Poverty rate 2.98%
Men 53.3 · Women 54.1
2010–2026
6,291
2026 projection
2.1% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
2010–2026
6,291
2026 projection
2.1% since 2020 (increase)
Source: U.S. Census Bureau decennial counts and annual estimates. 2026 is a projection. Values between recorded years are interpolated.
Use the left and right arrow keys to inspect population observations.
| 2026 | 6,291 | +3 | 0.05% |
|---|---|---|---|
| 2025 | 6,288 | +3 | 0.05% |
| 2024 | 6,285 | +14 | 0.22% |
| 2023 | 6,271 | +21 | 0.34% |
| 2022 | 6,250 | +19 | 0.30% |
| 2021 | 6,231 | +71 | 1.15% |
| 2020 | 6,160 | -211 | 3.31% |
| 2019 | 6,371 | -12 | 0.19% |
| 2018 | 6,383 | -6 | 0.09% |
| 2017 | 6,389 | -21 | 0.33% |
Showing 10 of 17 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 62 people).
Hispanic or Latino residents can be of any race. All other groups exclude Hispanic residents.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table B03002
Half of households earn more, half earn less
Typical yearly pay for a worker 25 or older.
About 1 in 34 residents
68% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 68% | 69% | 68% |
| Never married | 19% | 23% | 14% |
| Divorced | 7% | 8% | 7% |
| Widowed | 6% | 0% | 11% |
| Separated | 0% | 0% | 0% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau