John was the son of William and Mary (Burbank) Morse of Athol, Massachusetts. He was born there on 16 Apr 1769.
At the age of 34, he married Betsey Barrett on 3 July 1803 in Ashby, MA. The couple had two children, daughters: Betsey, born 25 May 1804 in Ashby, and Olive, born March 30, 1806, in Nelson.
He died on 12 January 1806 at just 37 years of age. He is buried in the Village Cemetery. You can visit his gravesite here.