Mary Olson lived in Fairfield Township, Palo Alto County, Iowa during the 1910 census.
Along with husband Stephen, their children were son's Orville, Elmer, Stanley, William, Olaf and daughters Marnie and Bernice.
The census indicates Mary had 7 children, all of which were living in 1910. This conflicts with the information provided on the 1900 census.
(Mary was the daughter of Elizabeth Knutson, the eldest daughter of Ole and Mari Finnestad)