Frank Derek Nelson (born 1955) is a South African-born Anglican priest who served as the Dean of Adelaide from 12 October 2012 to 4 April 2021, and previously served as Dean of Wellington from 2004 to 2012. Nelson was born in South Africa and grew up in East London. He was ordained in 1978, and moved to New Zealand in 1991 in response to apartheid. He worked in churches and cathedrals in South Africa, New Zealand, Hong Kong and Australia, before being invited by Archbishop Jeffrey Driver to become Dean of St Peter's Cathedral, Adelaide. Nelson is married to Christine.