Catherine Nyambura Ndereba (born 21 July 1972) is a Kenyan marathon runner.
She has twice won the marathon at the World Championships in Athletics and won silver medals at the Summer Olympic Games in 2004 and 2008.
She is also a four-time winner of the Boston Marathon.
Ndereba broke the women's marathon world record in 2001, running 2:18:47 at the Chicago Marathon.
In 2008, Ndereba was described by Chicago Tribune sportswriter Philip Hersh as the greatest women's marathoner of all time.