
Westfield
- County:
- Hampden County
- County Seat:
- No
- Area (mi²):
- 46.262
- State:
- Massachusetts
Westfield is a city located in Hampden County, Massachusetts. Westfield has a 2025 population of 40,353. Westfield is currently declining at a rate of -0.19% annually and its population has decreased by -0.96% since the most recent census, which recorded a population of 40,743 in 2020.
The average household income in Westfield is $104,129 with a poverty rate of 10.96%. The median age in Westfield is 39 years: 38.1 years for males, and 40.5 years for females.