James Alexander was a Scottish-born lawyer and politician in colonial New York. He served in the Colonial Assembly and as attorney general of the colony in 1721–23. His son William was later a major general in the Continental Army during the American revolution. Alexandria Township, New Jersey was named after James Alexander.

Alexandria Township is a township in Hunterdon County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 4,809, a decrease of 129 (−2.6%) from the 2010 census count of 4,938, which in turn reflected an increase of 240 (+5.1%) from the 4,698 counted in the 2000 census.