Ian Robertson is a Scottish broadcaster, writer and former international rugby player. He is best known as a rugby union commentator for BBC Radio. Robertson was educated at George Watson's College in Edinburgh, Aberdeen University and Christ's College, Cambridge. He worked for four years as an English teacher at Fettes College, where his most famous pupil was Tony Blair.

Ian played rugby union for Cambridge University, Watsonians, London Scottish, Aberdeenshire, Scotland (1968–70) and the Barbarians. The most memorable moment of his playing career was Scotland's 1970 Calcutta Cup victory over England. At 25 he suffered a serious knee injury that ended his sporting career.

Ian joined the BBC in 1972 and since April 1983 he has been the Corporation's official rugby union correspondent, covering the sport not only on radio but also on television. He regards Scotland's 1984 and 1990 Grand Slams and Jonny Wilkinson's winning drop-kick in the final of the 2003 World Cup as his "best on air moments". Robertson was also a presenter of the English Premiership video review of 1998-99. In February 2018 he announced that he will be retiring at the end of the year. 

Ian is a prolific writer; he has written over 30 books and a number of biographies, including those of Bill Beaumont, Andy Irvine, and actor Richard Burton.