
Westfield
- County:
- Union County
- County Seat:
- No
- Area (mi²):
- 6.724
- State:
- New Jersey
Westfield is a town located in Union County, New Jersey. Westfield has a 2025 population of 30,335. Westfield is currently declining at a rate of -0.37% annually and its population has decreased by -1.81% since the most recent census, which recorded a population of 30,895 in 2020.
The average household income in Westfield is $297,367 with a poverty rate of 2.06%. The median age in Westfield is 41 years: 40.4 years for males, and 41.4 years for females.