American army officer.
Officer in Continental Army. Commander at Wyoming, Pennsylvania (1784) and Fort Pitt (1785-86). Attempted to restrain western settlers from encroaching on Indian lands. Explored along the Ohio and Missouri Rivers (1790). Commander of Fort Hamilton (1791-93). Settled near Cincinnati (1793). Judge in Hamilton County, Ohio (1796-1814).
Son of Thomas and Jane (Hamilton) Armstrong of New Jersey. Married a daughter of William Goforth (1793).