The Rt Rev William Walmsley Sedgwick (1858–1948) was the 5th Anglican Bishop of Waiapu whose Episcopate spanned a 15-year period during the first half of the 20th century. Born at Freemantle in Southampton, he was educated at St Martin's, York and matriculated in 1879. He attended Christ's College, Cambridge and graduated in 1882 with a B.A. He was ordained as a deacon at Dover in 1882, and as a priest at Canterbury in 1883. He embarked on his career with a curacy at St. John The Baptist, Wateringbury.