The 2006–07 TFF Lig A (known as Türk Telekom Lig A for sponsoring reasons) was the second-level football league of Turkey and the 44th season since its establishment in 1963–64. At the end of the season in which 18 teams competed in a single group, Gençlerbirliği OFTAŞ and İstanbul B.B., which finished the league in the first two places, and the play-off winner Kasımpaşa were promoted to the upper league, while Türk Telekom, Akçaabat Sebatspor and Uşakspor, which were in the last three places, were relegated.[1][2]