威廉·亨利·“比尔”·寇司比（英语：William Henry "Bill" Cosby, Jr.，1937年7月12日－）是一位美国谐星，演员，作家，电视制作人，教育家，音乐家和社会活动家。出生于费城的一个工人区，1976年获得马萨诸塞大学阿默斯特分校的教育博士学位。曾在以他名字命名的情景喜剧《考斯比一家》（The Cosby Show）中演出。在儿童电视剧《电力公司》（The Electric Company）前两季中担任主要角色，并创作了教育卡通喜剧系列《猪头爱博特和邻居的黑小子们》（Fat Albert and the Cosby Kids）。寇司比也演过一些电影。他积极参加黑人社团的活动。

William Henry "Bill" Cosby, Jr. (born July 12, 1937) is an American stand-up comedian, actor, and author.

Cosby's start in stand-up comedy began at the hungry i in San Francisco, and was followed by his landing a starring role in the 1960s television show I Spy. During the show's first two seasons, he was also a regular on the children's television series The Electric Company.