William Henry Aldis (1871 – 16 June 1948) was an English Anglican missionary who served as Chairman of the Keswick Convention from 1936 to 1939, and again from 1946 to 1947.

[6] In 1899, the Boxer Rebellion prompted Aldis to join missionaries who moved to Shanghai, where he was ordained a deacon by Bishop Cassels at the city's Holy Trinity Cathedral in 1900.

Early in 1903 several were converted and baptized, among them James Yen, who in the 1920s founded the Mass Education Movement and in the 1940s the Sino-American Rural Reconstruction Commission.

[11] During this time, Ku Ho-lin, a convert from Islam and the future Assistant Bishop of East Szechwan, became a constant associate of Aldis's, who was going to be the first Chinese to be ordained deacon.

[14] On 27 June 1928, Aldis conducted the wedding service for the Evelyns at St Paul's Church, Portman Square.

[4] Shortly after the Evelyns' marriage, in 1929, he succeeded John Stuart Holden (1874–1934) as Home Director of the China Inland Mission.