USS Perfecto (SP-86) was a motorboat that served in the United States Navy during World War I. She was built in 1917 by the Greenport Basin and Construction Company in Greenport, New York, and owned by J. J. Phelps of Hackensack, New Jersey. She was acquired by the Navy on 22 June 1917 and placed in service on 25 June 1917. During World War I, Perfecto served in the 5th Naval District, headquartered in Norfolk Navy Yard in Norfolk, Virginia. She patrolled the coastline for German U-boats. She was returned to her owner, Phelps, after the war ended on 18 February 1919.

History
United States
Name	USS Perfecto (SP-86)
Owner	J. J. Phelps
Operator	United States Navy
Builder	Greenport Basin and Construction Company
Acquired	22 June 1917
In service	25 June 1917
Fate	Returned to private owner on 18 February 1919.
General characteristics
Length	60 ft (18 m)
Beam	10 ft (3 m)
Draft	3 ft (1 m)
Speed	20 knots
Complement	9
Armament	1 × machine gun