Geography Īccording to the United States Census Bureau, the township had a total area of 23.97 square miles (62.08 km 2), including 23.47 square miles (60.78 km 2) of land and 0.50 square miles (1.30 km 2) of water (2.09%). The township was named by Dutch settlers for Holland. Milford was created on April 15, 1911, from portions of Holland Township, based on the results of a referendum held on May 8, 1911. The township was reformed and separated as a municipality of its own again on March 11, 1879. It was created from Alexandria Township on April 13, 1874, before being dissolved and reabsorbed into Alexandria Township on March 4, 1878. The Delaware River forms its boundary with Pennsylvania and the Musconetcong River its boundary with Warren County. Holland Township is located in the northwestern part of Hunterdon County. As of the 2020 United States census, the township's population was 5,177, a decrease of 114 (−2.2%) from the 2010 census count of 5,291, which in turn reflected an increase of 167 (+3.3%) from the 5,124 counted in the 2000 census. Holland Township is a township in Hunterdon County, in the U.S.

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