The second USS Cossack (SP-695) was an armed motorboat that served in the United States Navy as a patrol vessel from 1917 to 1919.

Cossack was built as a civilian motorboat of the same name in 1916 by George Lawley & Son of Neponset, Massachusetts.

Assigned to the 1st Naval District, Cossack conducted patrols in the Boston, Massachusetts, until October 1918.

However, this proposed movement appears to have been cancelled, probably because of the armistice with Germany of 11 November 1918 that ended World War I and eliminated the need for more U.S. Navy patrol craft in Europe.

Instead, Cossack was reassigned to the 3rd Naval District in October 1918, probably for patrol service in the New York City area.