USS Nightingale (AMc-149) was a coastal minesweeper acquired by the U.S. Navy for the dangerous task of removing mines from minefields laid in the water to prevent ships from passing.

The fourth Nightingale was built by Western Boat Building Co., Tacoma, Washington, in 1940 as Saint Francis, a wooden hulled, diesel-powered purse seiner.

Redesignated IX-177 on 10 July 1944, after all the minesweeping equipment had been removed, she continued operations in the Puget Sound area.

These included utility services with the Torpedo Training Program out of Whidbey Island Naval Air Station.

She was placed out of service 3 December 1945 at the Puget Sound Naval Shipyard, Bremerton, Washington, struck from the Navy List 7 February 1946, and returned to the War Shipping Administration for disposal.