William McClung (July 12, 1758–1811) is a former United States federal judge.
Born in Rockbridge County, Virginia, McClung graduated from Washington College (now Washington and Lee University in 1785, and read law to enter the bar. He was in private practice in Bardstown, Kentucky from 1791 to 1796. He was a Kentucky state representative in 1793, and a Kentucky state senator from 1796 to 1800.
On February 23, 1801, McClung was nominated by President John Adams to a new seat as a federal judge on the United States circuit court for the Sixth Circuit, created by 2 Stat. 89. He was confirmed by the United States Senate on February 24, 1801, and received his commission the same day. McClung's federal judicial service was terminated on July 1, 1802, due to abolition of the court.
At some point thereafter he became a Circuit court judge for Nelson County, Kentucky, holding that office until his death, in 1811, near Maysville, Kentucky.