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Garwood is a borough in Union County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 4,454, an increase of 228 (+5.4%) from the 2010 census count of 4,226, which in turn reflected an increase of 73 (+1.8%) from the 4,153 counted in the 2000 census.
Source: Wikipedia