Issiar Dia was born on 8 June, 1987. He is a French-born Senegalese footballer who plays as a winger for Turkish club Yeni Malatyaspor. In summer 2006, Dia joined AS Nancy from SC Amiens for a €2 million transfer fee. On 10 September 2006, he made his Ligue 1 debut in a match against Toulouse FC replacing Monsef Zerka in the 68th minute. 18 days later, he scored on his international debut in a 3–1 return leg win against tournament favourites FC Schalke 04 in the first round of the UEFA Cup; he was involved in all three goals.
In his first spell at AS Nancy, he made a total of 115 league appearances scoring 13 goals with 8 of those coming in his last season at the club. On 21 July 2010, Fenerbahçe announced that Issiar had joined the team on a four-year contract for a sum of €8 million. He ended a long scoring drought on 5 February 2011 with a goal against Manisaspor, as Fenerbahçe won 3–1 in the dying minutes of the game. After a two-year spell with the Turkish club, he joined Qatari champions Lekhwiya SC.
Dia earned a call up to the France U-21 squad, the country of his birth. After his 21st birthday, he chose to pledge his future to the Senegalese. He was selected for the squad the first time possible, against Gambia, and came on as a substitute in the 61st minute for Frederic Mendy.