Frank Hadden (born 14 June 1954 in Dundee, Scotland) is coach of the Scotland national rugby union team. He replaced Matt Williams and was appointed on 15 September 2005.
Hadden coached the Merchiston Castle School (MCS) 1st XV after being appointed Head of Physical Education at the school in 1983. He coached several Scottish age-group teams before being appointed assistant coach of the Caledonian Reds in 1997. He was later appointed coach of Edinburgh Gunners (now Edinburgh Rugby) in 2000 prior to becoming the Scotland coach. He has since coached Scotland to notable wins over England and France in the 2006 Six Nations.
In April 2005 Matt Williams was sacked as Scotland coach after losing all but three of his 17 matches in charge. That month Hadden was appointed Scotland interim coach, leading Scotland to victories against the Barbarians and Romania. On September 15, 2005 Hadden was confirmed as Scotland coach until the Rugby World Cup in 2007.