USS Sagamore (AT-20) was a Bagaduce-class fleet tug which served in the United States Navy from 1917 to 1946.

Commanche was renamed Sagamore on 30 October 1917, launched in November 1917 and transferred to the Navy on 5 December 1917.

For his service in this operation, her commanding officer Chief Boatswain George Cregan, a Medal of Honor recipient, received the Navy Cross.

Sagamore was reclassified, Fleet Tug Old, (ATO-20) on 14 May 1944 and decommissioned on 31 August 1946, at the New York Navy Yard in Brooklyn, N.Y. She was struck from the Naval Register on 28 January 1947 and transferred to the Maritime Commission for disposal.

Sagamore was sold on 24 December 1947, to Hughes Brothers of New York City for $11,327.