William Croft (December 30 (baptism), 1678 - August 14, 1727) was an English composer and teacher.

Croft was born at the Manor House, Nether Ettington, Warwickshire. He was educated at the Chapel Royal, under the instruction of John Blow, and remained there until 1698. In 1700 he became organist of St. Anne's Church, Soho . In 1707, he took over the post vacated by the death of Jeremiah Clarke as "Master of the Children" at the Chapel Royal (one of his pupils was Maurice Greene), and the following year succeeded Blow as organist of Westminster Abbey. He composed works for the funeral of Queen Anne in 1714 and for the coronation of King George I the following year.

In 1724, Croft published Musica Sacra, a collection of church music, the first such collection to be printed in the form of a score. The Burial Service included in the collection has been used at state funerals ever since. Shortly afterwards his health deteriorated, and he died while visiting Bath.