Grétar Rafn Steinsson (born 9 January 1982) is an Icelandic former professional footballer who played as a right back.

[8] His breakthrough in the first team attracted interest from European clubs, such as Heerenveen, 1860 Munich and Sheffield United.

[26] Grétar made his Young Boys debut playing 22 minutes after coming on as a substitute in a 1–1 draw against Grasshoppers on 27 February 2005.

[35] He then made his league debut, coming on as a late substitute and played 6 minutes, in a 4–2 win over Ajax on 18 September 2005.

[41] Despite being out of the first team on three occasions,[42][43][44] Grétar finished his first season at AZ Alkmaar, making a total of 28 appearances and scoring 4 times.

[45] Despite this, Grétar managed to regain his first team place and scored his first goal of the season, in a 2–0 win over Sparta Rotterdam on 14 October 2006.

[46] After being featured in a handful of first team appearances in the first half of the season,[47] He scored again on 30 November 2006, in a 2–2 draw against Slovan Liberec.

[49] However, Grétar suffered a shoulder injury during a 2–1 win over Sevilla in a UEFA Cup match on 15 December 2006.

[55][56] After being out of the first team over suspension,[57] Grétar was featured in the KNVB Cup Final against Ajax, playing 120 minutes and scored in the penalty–shootout, as AZ went on to lose 8–7 as a result.

Ahead of the 2007–08 season, on 2 July 2007, AZ Alkmaar announced they had accepted a €3.5 million bid from Middlesbrough.

[63] After a failed transfer move in the summer, Grétar continued to impress when he set up a goal for Ari, in a 4–0 win over VVV-Venlo in the opening game of the season.

[69] Amid a transfer move to Bolton Wanderers,[70] He made his last appearance for the club on 13 January 2008, where he played 13 minutes, in a 6–1 defeat to Ajax.

[75][76] Prior to the move, he had been linked with the club six years ago and was recommended then Manager Sam Allardyce by his compatriot Guðni Bergsson but he decided against signing him.

[80] The club then found themselves in the relegation zone, but managed to avoid it when Grétar and the club won the remaining five matches by picking up win against Middlesbrough, a draw against Tottenham Hotspur, a win against Sunderland and a 1–1 draw against Chelsea to keep them up which could have also decided who won the Premier League title.

[86] After signing a four-year contract with the club in March 2009,[87] he then played a huge role for the side when he helped Bolton Wanderers push further into the top half of the table.

[88][89] In the last but one game of the season, Grétar's goal in a 1–1 draw against Hull City confirmed Bolton's Premier League survival.

In the 2009–10 season, Grétar found himself in a competition with new signing, Sam Ricketts over a right–back position and the club's decision to re-shuffle the defence.

[95] But by December, Grétar began to regain his first team place in the right–back position and was the outstanding performer for the whole game, in a 1–1 draw against Fulham on 28 November 2009.

[97] For the rest of the season, Grétar continued to feature in the first team under the new management of Owen Coyle, saying he's enjoying to play his tactics.

[136] Following his retirement, Grétar completed his studies on Football Management at Johan Cruyff Institute and holds the Level 5 (Technical Director) from the English FA.

Two months after joining AZ Alkmaar, on 21 January 2015, Grétar returned to English football, being appointed as technical director at Fleetwood Town of League One.

On 2 July 2022, Grétar moved from a position as Technical Adviser to the Iceland FA and joined Tottenham Hotspur as Performance Director.

[139] Steinsson later joined Leeds United in the role of Technical Director on 18 July 2023, following the club's takeover by 49ers Enterprises.

[140] After previously playing for all the youth levels representing Iceland,[141][142] Grétar was called up for the senior team in February 2002.

[144] He made his debut in a March 2002 friendly match against Brazil as a substitute and scored after being only 17 minutes on the pitch, in a 6–1 defeat.