John Armstrong was born 13 October 1717 in Brookeborough, County Fermanagh, Northern Ireland, United Kingdom and died 9 March 1795 Carlisle, Cumberland County, Pennsylvania, United States of unspecified causes. He married Rebecca Lyon Armstrong (1719-1797) 1747 in Northern Ireland, United Kingdom.
|Offspring of John Armstrong and Rebecca Lyon Armstrong (1719-1797)|
|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)|