USS Milan (YP‑6) was a 75-foot patrol boat which served in the United States Coast Guard as Onondago (WCG-209) until transferred to the United States Navy.

After her rechristening as USS Milan, (YP-6), a former district patrol vessel, was tied up at the Washington Navy Yard for the use of the Assistant Secretary of the Navy.

With the outbreak of World War II, she was returned to patrol duties.

In the middle of the war she was loaned, for a brief period, to the dock department, City of New York, after which she returned to the Washington, D.C., area, stationed at Dahlgren, Virginia.

Declared to be excess to the needs of the Navy on 5 April 1946, Milan was turned over to War Shipping Administration for disposal on 7 July 1946 and sold on 27 July 1946.