Giles B. Harber (1849 – December 29, 1925) was a rear admiral of the United States Navy and one-time Commander-in-Chief of both the United States Atlantic Fleet and the Pacific Fleet. He was born and died in Youngstown, Ohio. Harber, called a "Naval Hero" by The New York Times, was best known as for leading the rescue expedition for the USS Jeannette off of Siberia and the return of the body of her captain. He was a decorated by Congress for his role in the Spanish-American War.