Staunton, Sidney Augustus was born on June 7, 1850 in Ellicottville, New York, United States. Son of Joseph Marshall and Mary Elizabeth (Wilber) Staunton.
Graduated from the United States Naval Academy, 1871.
Ensign, July 1872; promoted through grades to rear admiral, February 20, 1910. Retired June 7, 1912.
Served on Iroquois, Congress, Wabash, Plymouth, Franklin, Powhatan, Marion, Trenton, Swatara, Pensacola, Chicago, Iowa, New York, Yankton, Rainbow, Helena, Colorado (in command of last 4) and various duties on shore, including service on General Board of the Navy, and Joint Board of Army and Navy. On staff of Rear Admiral Sampson, commander-in-chief of Atlantic Fleet, during Spanish-American War. Member special commission sent by the President to Europe, May-June 1912, to encourage participation by foreign goverments in the Panama-Pacific Exposition.
Married Emily Duncan Biddle, September 23, 1886( died 1892).