Sigurður "Siggi" Ragnar Eyjólfsson (born 1 December 1973) is an Icelandic football manager and former player. He was a professional forward in England and Belgium. From 2007 until 2013 he served as the head coach of Iceland women's national team, guiding them to the 2009 and 2013 editions of the UEFA Women's Championship.
Sigurður secured his place in Walsall history by scoring the third goal in the team's 3–1 win over Oldham Athletic in 1999, to secure promotion to the second tier of English football.
In August 2013 Sigurður resigned as coach of Iceland's women's team after seven years. He continued in his role as head of education at the Football Association of Iceland (KSÍ) and was looking to move into coaching men's football.
- Úrvalsdeild champion 2002, 2003