William McClung was born on November 6, 1806. He married Margaret Beatty of Butler, PA.

William and Margaret can be found in the 1850 census for Donegal, Butler County, PA; in the 1860 census for Oakland, Butler County, PA; and in the 1870 census for Sunbury, Butler County, PA.

Children shown living in their household over the years included Agnes, Charles, Robert, Jane, John, Martha A., Isaiah, and Angeline.