William Henry Hunt (12 June 1823 – February 1884) was the United States Secretary of the Navy under President James Garfield.

Born in Charleston, South Carolina, Hunt studied law at Yale. He finished his professional training in his brothers' office in New Orleans, Louisiana, where he was admitted to the bar in 1844. Hunt opposed secession and favored the Union cause. He was nevertheless drafted into the Confederate Army and commissioned Lieutenant Colonel. However, he managed to avoid involvement in military operations until Admiral David Farragut captured New Orleans.

In March 1876, Hunt was appointed Attorney-General of Louisiana, and in July of that year he was the Republican candidate for this office. Both parties claimed victory in the election, but Hunt lost the position when President Rutherford B. Hayes recognized the Democratic government of the State. As compensation, the President appointed him Associate Judge of the United States Court of Claims, 15 May 1878. He served in this capacity until he became President Garfield's Secretary of the Navy.

Secretary Hunt rendered invaluable service by reporting that the Navy, grossly neglected after the Civil War, was no longer able to protect Americans abroad. He appointed the first Naval Advisory Board which undertook the work of rebuilding the Navy, emasculated by public apathy and lock of funds. After Vice President Chester A. Arthur succeeded Garfield in the presidency, he retired Hunt from the cabinet by appointing him Minister to Russia 7 April 1882.

He died February 1884, while representing the United States at Saint Petersburg.

Two ships in the United States Navy have been named USS Hunt for him.