Westfield is a town in Union County, in the U.S. state of New Jersey, located 16 miles southwest of Manhattan. As of the 2020 United States census, the town's population was 31,032, an increase of 716 from the 2010 census count of 30,316, which in turn reflected an increase of 672 from the 29,644 counted in the 2000 census.
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