William John Monk (c. 1820 – 10 July 1896) was an English clergyman and activist for vegetarianism and temperance.

[4] Monk was the curate at Christ Church, Preston (1843–1845), Walton-le-Dale (1846–1847), Blackburn (1850–1853), Great Grimsby (1853–1858), St Alphege, Canterbury (1859–1863), Chartham, Kent (1863–1871) and vicar of Doddington (1872–1896).

[5] In 1878, Monk commented "I am now a strict vegetarian, living on farinaceous food, fruit and vegetables.

I drink nothing, not even water, a little milk and oatmeal porridge suffices for breakfast–butter and eggs I seldom touch".

[5] He was on the council of the United Kingdom Alliance and was secretary of the Canterbury Church of England Temperance Society.