Winfield Township is a township in Union County, New Jersey, in the United States. As of the 2010 United States Census, the township's population decreased to 1,471, the lowest recorded in any decennial census, reflecting a decline of 43 from the 1,514 counted in the 2000 Census, which had in turn declined by 62 from the 1,576 counted in the 1990 Census. Winfield and Linden share the same ZIP code.Winfield Township was incorporated as a township by an act of the New Jersey Legislature on August 6, 1941, from portions of Clark and Linden, passing over the Governor's veto.
