Sir John William Hansen KNZM (born 1945) is a retired judge of the New Zealand High Court and a member of the International Cricket Council Code of Conduct Commission.He has held several judicial offices from 1979 until 1988 in Hong Kong and since 1988, in the High Court of New Zealand. He was a professional cricket player and later took on administrative jobs at International Cricket Council. Since 2019, Hansen has been the chairperson of the Canterbury District Health Board.