William Thompson Lusk (May 23, 1838 – June 12, 1897) was an American obstetrician and a soldier who rose to the rank of Assistant Adjutant-General in the United States Volunteers during the first three years of the American Civil War.
After he retired from the Union Army, he finished his medical education and became a professor as well as a president of the Bellevue Hospital Medical College.
He received much recognition and fame for his 1882 book, The Science and Art of Midwifery, which quickly became a widely referenced text.