The 1973–74 season was the sixth season of Mersin İdmanyurdu (MİY) football team in Turkish First Football League, the first level division in Turkey.

Executive committee: Mehmet Karamehmet (president), Mahir Turhan, Ünal Şıhman, Atilla Taşpınar, Kayhan Okdar, Aydın Özlü, Alptekin Ürgüplü, Yaman Atalay, Sadık Eliyeşil, Mehmet Emin Yıldız, Mustafa Elgin, Erol Tarhan, Reşat Çağlı, Sungur Baydur, Kemal Saraçoğlu.

Mersin İY finished 15th with 8 wins and relegated to second division next year.

Results of games MİY played in 1973–74 First League by rounds: 1973–74 Turkish Cup was played for the 12th season as Türkiye Kupası by 27 teams.

Top ten first division teams from previous season participated.

Mersin İdmanyurdu did not participate in 1973–74 Turkish Cup because they had finished previous season at 11th place.

1973–74 Mersin İdmanyurdu head coaches: Stats are counted for 1973–74 First League matches.