Anthony Tillmon “Tony” Williams (December 12, 1945 – February 23, 1997) was an American jazz drummer.

Williams first gained fame in the band of trumpeter Miles Davis and was a pioneer of jazz fusion. He was inducted into the Modern Drummer Hall of Fame in 1986. Williams was born in Chicago and grew up in Boston. He was of African, Portuguese, and Chinese descent. He studied with drummer Alan Dawsonat an early age, and began playing professionally at the age of 13 with saxophonist Sam Rivers. Saxophonist Jackie McLean hired Williams when he was 16.

At 17 Williams gained attention by joining Miles Davis in what was later dubbed Davis’s Second Great Quintet. Williams was a vital element of the group, called by Davis in his autobiography “the center that the group’s sound revolved around.” His playing helped redefine the role of the jazz rhythm section through the use of polyrhythms and metric modulation, moving between mathematically related tempos and/or time signatures. Meanwhile, he recorded his first two albums as leader for Blue Note label, Life Time (1964) and Spring (1965). He also recorded as a sideman for the label including, in 1964, Out to Lunch! with Eric Dolphy and Point of Departure with Andrew Hill.

In 1969, he formed a trio, the Tony Williams Lifetime, with John McLaughlin on guitar and Larry Young on organ. Lifetime was a pioneering band of the fusion movement, a combination of rock, R&B, and jazz.