Stephen Mack was born June 15, 1766 in Marlow, New Hampshire to Solomon Mack and Lydia Gates Mack. His father noted: "There were but four families in forty miles...As our children were wholly deprived of the privilege of schools, she took the charge of their education..." In 1779, not yet 13 years old (his father called him fourteen), he enlisted with his father and older brother Jason to serve on a privateer in the American Revolutionary War. His father related one incident when:
- "My son Stephen, in company with the cabin boys, was sent to a house, not far from the shore, with a wounded man...A woman was engaged in frying cakes at the time, and being somewhat alarmed, she concluded to retire into the cellar, saying, as she left, that the boys might have the cakes, as she was going below. The boys were highly delighted at this, and they went to work cooking and feasting upon the lady’s sweet cakes, while the artillery of the contending armies was thundering in their ears, dealing out death and destruction on every hand. At the head of this party of boys was Stephen Mack, my second son, a bold and fearless stripling of fourteen."
Stephen served on this trip in March 1779, and then served in the American Army from July 25, 1779 until August 31, 1779 with his brother Jason. He reenlisted, still aged only 15, for three years; serving from April 2, 1781 into 1783.
Mack settled in Tunbridge, Vermont where he established a store in town and a farm where he lived in the country. He had a son Stephen Mack, Jr. born 2 February 1798 in Tunbridge. Mack moved to Detroit, Michigan in either 1800 or 1807. He left his family behind in Vermont where the children could be better schooled and established a string of merchant and business ventures in Michigan. In Detroit during the War of 1812, he was given the captaincy of a company; however, the city was quickly surrendered to the British. Mack is said by his sister to have broken his sword over his knee and thrown it into the lake on hearing of the surrender. To save his property, his housekeeper housed British officers and pretended the house and business were her own.
After the war, Mack brought his family to Michigan. They briefly lived in Detroit before settling in Pontiac, Michigan where Mack had a farm and a building firm as well as a sawmill and a flour mill. He is said to have at his own expense paid for the extension of Woodward Avenue to Pontiac, then a major road in Detroit. He also built a sawmill in Rochester, Michigan and had ventures in Ohio.
In 1812 he became a trustee of the village of Detroit and later a director of the Bank of Michigan. He was referred to as Major by a neighbor and called Colonel in his obituary.
He died after an illness of four days and left an estate of fifty thousand dollars.
The major thoroughfare, Mack Avenue, in Detroit is named after him.
- The Revised and Enhanced History of Joseph Smith by His Mother