William Laing (c. 1831 – September 29, 1864) was a soldier in the Union Army and a Medal of Honor recipient for his role in the American Civil War.

Laing enlisted in the Army from Brooklyn in August 1862.

[1] Rank and organization: Sergeant, Company F, 158th New York Infantry.

Place and date: At the Battle of Chaffin's Farm, Va., September 29, 1864.

This biographical article related to the United States Army is a stub.