Dame Sonia Rosemary Susan Proudman, DBE (born 30 July 1949), styled The Hon. Mrs Justice Proudman, is a British High Court judge.
Proudman was educated at St Paul's Girls' School and Lady Margaret Hall, Oxford.
She was called to the Bar, Lincoln’s Inn in 1972. She became a Bencher in 1996 and a Recorder in 2000. She was a Deputy High Court Judge from 2001 to 2008, until she was appointed to the Chancery Division on a full time basis.
Proudman was made an Dame Commander of the Order of the British Empire in 2008.