When Sarah Jane Mills was born on 27 June 1817, in Yarmouth Centre, Central Elgin, Elgin, Ontario, Canada, her father, James Mills, was 23 and her mother, Jemima Huff, was 23. She married Hiram Burley Smith on 5 January 1836, in London, Middlesex, Ontario, Canada. They were the parents of at least 3 sons. She lived in Yarmouth, Elgin, Ontario, Canada in 1871. She died on 9 December 1849, in Sparta, Yarmouth, Elgin, Ontario, Canada, at the age of 32.