Township in Northeastern Connecticut Planning Region County, Connecticut · 48.3 sq mi · 378 people per sq mi
About 18,000 people live in Killingly. The typical household earns $84,350, and the median resident is 39.5 years old.
2026 projection
From 17,684 in 2020
Poverty rate 11.44%
Men 38.8 · Women 40.3
2010–2026
18,281
2026 projection
3.4% 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
18,281
2026 projection
3.4% 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 | 18,281 | +104 | 0.57% |
|---|---|---|---|
| 2025 | 18,177 | +104 | 0.58% |
| 2024 | 18,073 | +143 | 0.80% |
| 2023 | 17,930 | +135 | 0.76% |
| 2022 | 17,795 | +73 | 0.41% |
| 2021 | 17,722 | +38 | 0.21% |
| 2020 | 17,684 | +338 | 1.95% |
| 2019 | 17,346 | +7 | 0.04% |
| 2018 | 17,339 | +135 | 0.78% |
| 2017 | 17,204 | +89 | 0.52% |
Showing 10 of 17 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 179 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 9 residents
47% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 47% | 50% | 44% |
| Never married | 31% | 35% | 28% |
| Divorced | 14% | 11% | 17% |
| Widowed | 8% | 4% | 12% |
| Separated | <1% | <1% | <1% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau