Thomas Henry Haines (born August 9, 1933) was an American author, social activist, biochemist and academic. He was a professor of chemistry at City College of New York and of Biochemistry at the Sophie Davis School of Biomedical Education. He was a visiting professor in the Laboratory of Thomas Sakmar at Rockefeller University. He also served on the board of the Graham School, a social services and foster care agency in New York City. His scientific research focused on the structure and function of the living cell membrane. He is the father of Avril Haines, the seventh Director of National Intelligence.