William Elbridge Sewell (November 16, 1851 – March 18, 1904) was a United States Navy Lieutenant Commander, and the 6th Naval Governor of Guam from February 9, 1903 until being transported back to the mainland United States for medical treatment on January 11, 1904. He was born in Colchester, New York and appointed to the United States Naval Academy from that state in 1867. He did not become an Ensign immediately, but served on numerous ships before achieving the rank.