İlhan Eker (born January 1, 1983 in Kepsut, Turkey) is a Turkish football defender. He currently plays for Kasımpaşaspor. Standing at 185 cm, he is equally adept at playmaking and scoring.
Eker has previously played for Balıkesirspor. From Balıkesirspor, he moved to Hacettepe Spor in 2001. Seven years later, Eker transferred from Gençlerbirliği OFTAŞ, which is now called Hacettepe Spor, to Gençlerbirliği. On June 2, 2010, the 27 year-old center back left Gençlerbirliği to sign with Fenerbahçe until 30 June 2013. Eker was sent to Kayserispor in exchange for Serdar Kesimal to Fenerbahçe SK.