William Willcox Perrin (11 August 1848 – 27 June 1934) was an Anglican bishop in the late 19th and early 20th centuries.

[3] He was consecrated a bishop on 24 March 1893, by Edward White Benson, Archbishop of Canterbury, at Westminster Abbey.

During this period he was also the rector of St Andrew Undershaft[2] A noted Freemason[5] (he kept the rectory until his death).

[9] He retired in summer 1929,[10] resigning his see in time for his successor's consecration on the Feast of St James (25 July).

[11] He became an Assistant Bishop of London until his death[6] — he apparently retained oversight of Hampstead deanery throughout.