Alvey Augustus Adee (November 27, 1842 – July 4, 1924) was a long-time official with the United States Department of State who served as the acting Secretary of State in 1898 during the Spanish–American War. He was the second of three senior State Department officials—the first being William Hunter and the third Wilbur J. Carr—whose overlapping careers provided continuity and good management in American foreign policy for over a century, from the administration of President Andrew Jackson until that of Franklin D. Roosevelt.