Marcia Rachel Clark (born Marcia Rachel Kleks; August 31, 1953) is an American prosecutor, author and television correspondent. She was the lead prosecutor in the O. J. Simpson murder case.
Clark was born in Alameda, California, the daughter of Rozlyn (née Masur) and Abraham Kleks. Her father was born and raised in then Mandatory Palestine (now Israel), and worked as a chemist for the Food and Drug Administration. She was raised in a Jewish family. She has a younger brother by six years who became an engineer. Due to her father's job with the FDA, the family moved many times, living in California, New York, Michigan, and Maryland.
Clark graduated from Susan E. Wagner High School, a public high school in the Manor Heights section of Staten Island, New York City, New York. She studied at the University of California, Los Angeles, graduating in 1976 with a degree in political science, then earned a Juris Doctor degree at Southwestern University School of Law.