Janis Graham Jack (born 1946) is a United States federal judge of the United States District Court for the Southern District of Texas.Jack was born in Los Angeles, California. She received a R.N. from St. Thomas School of Nursing (part of the University of St. Thomas (Texas)) in 1969, a B.A. from the University of Baltimore in 1974, and a J.D. from South Texas College of Law in 1981. She was in private practice in Corpus Christi, Texas from 1981 to 1993.