USS Louise No. 2 (SP-1230), sometimes written Louise # 2 and also referred to during her naval career as Louise and as Pilot Boat No. 2, was a United States Navy patrol vessel in commission from 1917 to 1919. The Louise, was a pilot boat from 1900 to 1917. She was a replacement for the pilot boat Columbia, that was washed ashore in 1898. After the World War I the Louise returned to pilot service until 1924 when she was purchased as a yacht. In 1924, the Boston pilot boat Pilot, took the place of the Louise.