William Whiting (March 3, 1813 – June 29, 1873) was a United States representative from Massachusetts.

In this he formulated views that he had urged at the opening of the American Civil War, namely, that the U. S. government had full belligerent rights against the inhabitants of seceded states, and without going beyond the Constitution could confiscate their property, emancipate their slaves, and treat them as public enemies.

These opinions were at first received with caution by most public men, but they were finally sanctioned and adopted by the government.

Besides this, he published various pamphlets, chiefly legal arguments before the U. S. courts; a "Memoir of Rev.

Samuel Whiting and of his Wife, Elizabeth St. John, with Reference to some of their English Ancestors and American Descendants (printed privately, Boston, 1871).