Born: 1789-03-31 Cabarrus County, North Carolina
Died: 1871-06-13 Sangamon County, Illinois
Irwin and his family moved from North Carolina to Sangamon County, Illinois, in 1827, settling on Richland Creek in what would become Cartwright Township. In 1811, he married Margaret Purivance, with whom he had five children while living in North Carolina. After moving to Sangamon County, the couple had an additional three children.
John Carroll Power and S. A. Power, History of the Early Settlers of Sangamon County, Illinois (Springfield, IL: Edwin A. Wilson, 1876), 404-405.