Leigh Stewart Estabrook (born May 1, 1942) is Dean Emerita at the University of Illinois School of Information Sciences.

She is a sociologist and library and information science professor, noted for her innovations in research, including building a diverse faculty actively engaged in research ranging from historical work to digital library initiative projects.

Among Estabrook's accomplishments during her time as dean was establishment of LEEP Online Education LEEP, [4] relocating the School's facilities to property purchased from the Acacia fraternity, and bringing The Bulletin of the Center for Children's Books to the program.

After her term as dean Estabrook continued as director of the Library Research Center.

[5] The Center conducted dozens of studies, including a series on the impact of the USAPATRIOT Act on libraries.