USS Helori (SP-181), later YP-181, was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1922. Helori was built as a civilian motorboat of the same name in 1911 by Johnson Brothers and Blanchard at Seattle, Washington, for use as a pleasure craft. The U.S. Navy purchased her from her owner, either Omar J. Humphrey or H. G. Kenney of Seattle, on 23 April 1917 for World War I service as a patrol vessel. She was commissioned as USS Helori (SP-181) on 21 May 1917 at Puget Sound Navy Yard, Bremerton, Washington.