The sixth USS Congress (ID-3698) was a motor launch in commission in the United States Navy as a patrol vessel from 1918 to 1919.

The U.S. Navy's 5th Naval District inspected her on 17 May 1918 for possible World War I service.

Foster of Grimstead, Virginia, in October 1918, having already commissioned her as USS Congress on 25 September 1918.

Congress carried out miscellaneous patrol duties in the 5th Naval District until 23 September 1919, when she was stricken from the Navy Directory.

She was sold on 23 September 1919, then possibly resold on 8 December 1919, ultimately being delivered to Sallie S. Thorns of West Norfolk, Virginia, on 24 December 1919.