Ivan Roa Christian (31 May 1919 – 1991) was a politician from Pitcairn. He was the Chief Magistrate of Pitcairn Island from 1976 to 1984. As his surname suggests, he is descended from the original mutineers who settled the island, led by Fletcher Christian. He is related to a number of other island leaders, including his father Richard Edgar Christian, his uncle Charles Richard Parkin Christian and his great-grandfather Thursday October Christian II. Through his marriage to Verna Young, he is the father of Steve Christian and Brenda Christian.