USS Margin
|  Margin as a private motorboat in 1917. | |
| History | |
|---|---|
| .svg.png) United States | |
| Name | USS Margin | 
| Namesake | Previous name retained | 
| Builder | W. E. Haff, Neptune Island, New York | 
| Completed | 1917 | 
| Acquired | 21 March 1918 | 
| Commissioned | 28 June 1918 | 
| Fate | Returned to owner 1 April 1919 | 
| Notes | Operated as private motorboat Margin 1917-1918 and from 1919 | 
| General characteristics | |
| Type | Patrol vessel | 
| Displacement | 2.5 tons | 
| Length | 41 ft 6 in (12.65 m) | 
| Beam | 7 ft (2.1 m) | 
| Draft | 2 ft 6 in (0.76 m) | 
| Speed | 13 knots | 
| Complement | 4 | 
| Armament | 1 × machine gun | 

USS Margin (SP-2119), also ID-2119, was a United States Navy patrol vessel in commission from 1918 to 1919.
Margin was built as a private motorboat of the same name in 1917 by W. E. Haff at Neptune Island, New York. On 6 December 1917, the 3rd Naval District inspected her for possible naval service, and on 21 March 1918 the U.S. Navy acquired her under a free lease from her owner, W. D. Hatch of Neptune Island, for use as a section patrol boat during World War I. She was commissioned as USS Margin (SP-2119 or ID-2119) on 28 June 1919.
Assigned to the 4th Naval District, Margin served on patrol duty for the rest of World War I. The Navy returned her to Hatch on 1 April 1919.
References
 This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here. This article incorporates text from the public domain Dictionary of American Naval Fighting Ships. The entry can be found here.
- Department of the Navy Naval History and Heritage Command Online Library of Selected Images: Civilian Ships: Margin (Motor Boat, 1917). Served as USS Margin (ID # 2119) in 1918-19
- Photo gallery of USS Margin at NavSource Naval History