| History | |
|---|---|
 United States | |
| Name | USS League Island |
| Namesake | League Island, the site of the Navy Yard, Philadelphia, Pennsylvania, at the junction of the Schuylkill River and the Delaware River |
| Owner | Reynolds Palmer and Raymond H. Abell, Gales Ferry, Connecticut |
| Builder | Neafie & Levy S. and E. B. Co., Philadelphia, Pennsylvania |
| Laid down | date unknown |
| Completed | April 1907 |
| Acquired | by the Navy 24 February 1941 |
| In service | 7 March 1941 |
| Out of service | 6 June 1946 |
| Reclassified | YFB-20 27 February 1941 |
| Stricken | date unknown |
| Homeport | League Island, Philadelphia |
| Fate | Returned to War Shipping Administration (WSA) 9 January 1947 |
| General characteristics | |
| Type | commercial ferryboat |
| Displacement | 425 tons |
| Length | 136' 6" |
| Beam | 29' |
| Draft | 8' 9" |
| Propulsion | not known |
| Crew | 20 crew members |
| Armament | not known |
USS League Island (YFB-20) was a 166-foot-long commercial craft acquired by the U.S. Navy during World War II. It was primarily used as a ferryboat on the Delaware River, transporting military personnel between the Philadelphia Navy Yard, located on League Island, and military activities and contractors on the New Jersey side of the river.