本华·曼德博（法语：Benoît B. Mandelbrot，1924年11月20日－2010年10月14日）又译伯努瓦·曼德勃罗，生于波兰华沙，是一名数学家。幼年随全家移居法国巴黎，大半生均在美国度过，拥有法国和美国的双重国籍。曼德博的研究范围广泛，从数学物理到金融数学，但他最大的成就则是创立了分形几何。他创造了“分形”这个名词，并且描述了曼德博集合。他也致力于向大众介绍自己的理论，通过面向普通公众的著作和演讲，使他的研究成果广为人知。

本华·曼德博是他所用的中文名，在他的个人网页眉页可以见到。

Benoit B. Mandelbrot (20 November 1924 – 14 October 2010) was a Polish-born, French and American mathematician with broad interests in practical sciences, especially regarding what he labeled as "the art of roughness" of physical phenomena and "the uncontrolled element in life." He referred to himself as a fractalist. He is recognized for his contribution to the field of fractal geometry, which included coining the word fractal as well as for developing a theory of roughness and self-similarity in nature.