Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Alexandria Township is a Township in Hunterdon County, New Jersey, United States. As of the United States 2000 Census, the township population was 4,698.Alexandria was formed by Royal Charter on March 5, 1765, from portions of Bethlehem Township, and was incorporated as one of New Jersey''s initial 104 townships by an Act of the New Jersey Legislature on February 21, 1798. Portions of the township were taken to form Frenchtown (April 4, 1867), Holland Township (April 13, 1874, restored to Alexandria on March 4, 1878, recreated on March 11, 1879) and Milford (April 15, 1911).