Orhan Kaynak (born 1 March 1970 in Adana), also known as Küçük Orhan, is a retired Turkish footballer best known for his stints in the Turkish Süper Lig with Adanaspor, Trabzonspor, and Kocaelispor.

Orhan followed his brothers and graduated from the Adanaspor and joined the first team in the Süper Lig.

He spent the rest of his career in the highest divisions of Turkey, with notable performances with Trabzonspor and Kocaelispor.

After seven months, on 24 January 2019, Kaynak decided to resign from Elazığspor.

His brothers Reşit, Kayhan, İrfan, İlhan and Ayhan were all professional footballers.