Okben Ulubay (born May 25, 1996) is a Turkish professional basketball player for Trabzonspor of the Türkiye Basketbol Ligi (TBL).

Ulubay started playing basketball with the youth academies of the Turkish club, Efes Istanbul when he was five.

In 2012, Ulubay signed a seven-year contract with the senior men's club of Efes Istanbul.

[4] On July 23, 2022, he has signed with Beşiktaş Icrypex of the Basketbol Süper Ligi (BSL).

[5] On June 26, 2023, he signed with Türk Telekom of the Turkish Basketbol Süper Ligi (BSL).