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 2026 population of 32,050. Westfield is currently growing at a rate of 3.17% annually and its population has increased by 3.73% since the most recent census, which recorded a population of 30,898 in 2020.