USS PT-191 was a motor torpedo boat of the United States Navy. On the night of 24–25 October 1944 she was on patrol in Surigao Strait, one of thirty-nine motor torpedo boats keeping that patrol.
The patrol placed her in the Battle of Surigao Strait on 25 October 1944. Her place in the battle was with the motor torpedo boat patrol in the strait.
That night is the mark of her service. PT-191 was one of the motor torpedo boats on patrol in Surigao Strait on 24–25 October 1944, and she met the battle in that company.
