
Seymour
- County:
- Naugatuck Valley Planning Region
- County Seat:
- No
- Area (mi²):
- 14.518
- State:
- Connecticut
Seymour is located in Naugatuck Valley Planning Region, Connecticut. Seymour has a 2025 population of 17,263. Seymour is currently growing at a rate of 0.91% annually and its population has increased by 3.28% since the most recent census, which recorded a population of 16,714 in 2020.
The average household income in Seymour is $125,321 with a poverty rate of 6.28%. The median age in Seymour is 40.6 years: 40.4 years for males, and 40.7 years for females.