Theodore Frelinghuysen Jewell (August 5, 1844 – July 26, 1932) was a rear admiral of the United States Navy.

[1] Jewell was appointed an acting midshipman on November 29, 1861, when he entered the United States Naval Academy.

During the Civil War while still at the Naval Academy, in the summer of 1863 when the nation's capital was threatened by General Robert E. Lee's forces, he was in command of a fleet of howitzers at the US Naval Yard for the defense of Washington, D.C. Jewell was involved in peacekeeping activities from the Tuscarora in Seoul, Korea, Panama in 1872, and Hawaii in 1874, during the election of King Kalākaua, to negotiate the duty-free exportation of sugar to the United States.

A riot occurred on election day and marines and sailors from the Tuscarora and the USS Portsmouth landed to restore order.

From January 1893 to February 1896 he was superintendent of the Naval Gun Factory at the Washington Navy Yard.