Mersin İdmanyurdu (also Mersin İdman Yurdu, Mersin İY, or MİY) Sports Club; located in Mersin, east Mediterranean coast of Turkey in 1966-1967. The 1966–67 season was the 3rd season of Mersin İdmanyurdu football team in Second League, the second level division in Turkey. The team became the champions of the league and promoted to 1967-68 Turkish First Football League at the end of the season.

The team's name was changed to Mersin İdmanyurdu from Çukurova İdmanyurdu which was the name adopted under Çukurova Group sponsorship. This decision was made in the congress of the club held on 15.06.1966. In the congress, following were elected for executive committee: Nevzat Emrealp, Mehmet Karamehmet, Halit Gazioğlu, Mahir Turhan, Mustafa Sözmen, Faruk Niskavi, Ünal Şıhman, Erol Tarhan, Sungur Baydur, Sezai Sak, Aydın Özlü. The committee declared that an amount of TL 500.000 was allocated for transfers and Sabri Kiraz was decided to be spoken with as manager of the footbal team. However, later, Lefter Küçükandonyadis has become the manager, famous former player of Fenerbahçe and Turkey national football team. In the mid-season Küçükandonyadis left his previous team Feriköy and started his manager career in MİY on 16.02.1967. He demanded that existing coach Fahrettin Cansever should also remain as trainer.

Executive committee at the beginning of the season had been consisted of: Nevzat Emrealp (president), Nail Turan (deputy president), Dr. Aydın Özlü (secretary), Sezai Sak (general captain), Sungur Baydur (accountant), Halil Gazioğlu, Ünal Şıhman (members).

Mersin İdmanyurdu has won the league title in Turkish Second Football League, 1966–67 season. They finished the season in Red Group at first place. After season they won Second League Championship match against Bursaspor. As champions they were eligible to play Prime Minister's Cup (Chancellor Cup) against champions of the amateur leagues.

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