Allamuchy Township is a township in Warren County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 5,335, an increase of 1,012 (+23.4%) from the 2010 census count of 4,323, which in turn reflected an increase of 446 (+11.5%) from the 3,877 counted in the 2000 census.

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