John Armstrong, Jr. was born 25 November 1758 in Carlisle, Cumberland County, Pennsylvania, United States to John Armstrong (1717-1795) and Rebecca Lyon Armstrong (1719-1797) and died 1 April 1843 Red Hook, Dutchess County, New York, United States of unspecified causes. He married Alida Livingston (1761-1822) 18 January 1789 in New York City, New York, United States.
Children
| Name | Birth | Death | Joined with |
| Horatio Robert Gates Armstrong (1790-1859) | |||
| Henry Beekman Armstrong (1791-1884) | |||
| John Armstrong (1793-1853) | |||
| Robert Livingston Armstrong (1797-1834) | |||
| Margaret Alida Rebecca Armstrong (1800-1872) | 17 July 1800 Red Hook, Dutchess County, New York, United States | 15 February 1872 Manhattan, New York, United States | William Backhouse Astor (1792-1875) |
| James Kosciuszko Armstrong (1801-1868) | |||
| Edward Armstrong (1802-1802) | |||
| William Armstrong (1814-1902) | |||
Siblings
| Name | Birth | Death | Joined with |
| James Armstrong (1748-1828) | |||
| John Armstrong (1758-1843) | 25 November 1758 Carlisle, Cumberland County, Pennsylvania, United States | 1 April 1843 Red Hook, Dutchess County, New York, United States | Alida Livingston (1761-1822) |
Residences
Footnotes (including sources)
| ‡ General |
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