William Toomey was born on 14 October 1887, in Pittston, Luzerne, Pennsylvania, United States as the son of Thomas Toomey and Hannah Holland. He married Myrtle I Jones on 29 November 1929, in Vader, Lewis, Washington, United States. He lived in Lewis, Washington, United States in 1910 and Cowlitz Bend Election Precinct, Lewis, Washington, United States in 1940. He died on 26 July 1951, in Washington, United States, at the age of 63, and was buried in Vader, Lewis, Washington, United States.