City in Naugatuck Valley Planning Region County, Connecticut · 5.1 sq mi · 2,585 people per sq mi
About 13,000 people live in Derby. The typical household earns $79,500, and the median resident is 46.4 years old.
2026 projection
From 12,311 in 2020
Poverty rate 10.76%
Men 43.7 · Women 47
1790–2026
13,071
2026 projection
6.2% 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.
1790–2026
13,071
2026 projection
6.2% 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 | 13,071 | +146 | 1.13% |
|---|---|---|---|
| 2025 | 12,925 | +30 | 0.23% |
| 2024 | 12,895 | +455 | 3.66% |
| 2023 | 12,440 | +61 | 0.49% |
| 2022 | 12,379 | +28 | 0.23% |
| 2021 | 12,351 | +40 | 0.32% |
| 2020 | 12,311 | -15 | 0.12% |
| 2019 | 12,326 | -74 | 0.60% |
| 2018 | 12,400 | -119 | 0.95% |
| 2017 | 12,519 | -31 | 0.25% |
Showing 10 of 39 years.
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S0101
Each square is about 1% of residents (roughly 125 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
39% of residents age 15 and older are married.
| Status | Overall | Male | Female |
|---|---|---|---|
| Married | 39% | 40% | 39% |
| Never married | 39% | 48% | 31% |
| Divorced | 13% | 9% | 18% |
| Widowed | 8% | 4% | 11% |
| Separated | <1% | 0% | 2% |
U.S. Census Bureau, 2024 ACS 5-year estimates · Table S1201
10 sources, all from the U.S. Census Bureau