Mersin İdmanyurdu (also Mersin İdman Yurdu, Mersin İY, or MİY) Sports Club; located in Mersin, east Mediterranean coast of Turkey in 1963-1964. MİY was Turkey Amateur Champions in 1963. The 1963–64 season was the 1st season of Mersin İdmanyurdu football team in Second League, the second level division in Turkey. It was also the first season of the team in a professional league in Turkish football league system. The team also attended 1963–64 Turkish Cup (Türkiye Kupası) and was eliminated at third round.

MİY attended Turkish Second Football League in 1963–64 season as Çukurova İdmanyurdu (ÇİY) (due to sponsorship reasons). The president of the club was Mehmet Karamehmet. The season started with preparation games in August 1963 and ended on 31 May 1964 with the last round game of the second league. Head coach was İlhan Taşucu. He managed team with trainer Nazım Koka. Mostly appeared players were Alp Sümeralp and Muaammer Yapıcı (C), while top goal scorer was Hüseyin İlgin.

Preparation games: ÇİY-Tarsus İdmanyurdu: 7-0. ÇİY-Tarsus İdmanyurdu: 5-1. ÇİY-Türkocağı: 1-0. ÇİY-Doğanspor: 3-0.

The 1963–64 was the first season of the league. ÇİY was one of two clubs became professional, which were coming from regional leagues other than Ankara, İstanbul and İzmir and participated in Second League. The other team was one of MİY's rivals, Adana Demirspor. Bursaspor was also formed by merging amateur clubs of the city and accepted to league at this season. The league season started with Çukurova İdmanyurdu – Adana Demirspor match in Mersin on 15 September 1964 and finished on 31 May 1965. The winner team promoted to 1964–65 First League and one bottom team relegated to regional league.

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