John Hammond (August 17, 1827 – May 28, 1889) was an American manufacturer, Union Army officer and politician from Crown Point, New York.

[2] He attended Rensselaer Polytechnic Institute and worked at his family's store in Crown Point before moving to California during the 1849 gold rush.

[2] At the start of the American Civil War, he assisted in raising and equipping a unit which was mustered into service as Company H, 34th New York Volunteer Infantry.

Hammond became active in the Grand Army of the Republic, and the Military Order of the Loyal Legion of the United States, and the GAR post in Crown Point was named for him.

He was also a civic leader and philanthropist, and donated to or helped construct several local facilities in Crown point, including the Congregational church and the town library.