34 or USS S.C. 34, was an SC-1-class submarine chaser built for the United States Navy during World War I. SC-34 was a wooden-hulled 110-foot (34 m) submarine chaser built at the New York Navy Yard at Brooklyn, New York.

During her service, SC-34 played a crucial role in patrolling the coastal waters of the United States and ensuring the safety of shipping lanes from enemy submarines.

Her operational history is marked by several successful patrols and escort missions that contributed significantly to the naval strategy during the war.

When the U.S. Navy adopted its modern hull number system on 17 July 1920, Submarine Chaser No.

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