On 21 Sep 1907 when Olen Harrisson was 22, he married Marion Shears, daughter of George W. Shears (6 Feb 1858-8 May 1936) & Alice E. Hagon (21 Nov 1860-1 Mar 1931), in Chester Township, Ottawa County, Michigan. Born on 6 Apr 1886 in Nunica, Ottawa County, Michigan. Marion died in Conklin, Ottowa County, Michigan, on 31 Dec 1940; she was 54.