Octavius Ellis (born March 10, 1993) is an American professional basketball player for Uralmash Yekaterinburg of the VTB United League.

There, he averaged 14.8 points, 9.7 rebounds and 3.2 blocked shots as a red-shirt sophomore during the 2013–14 season, while being named First Team All-America by the National Junior College Athletic Association.

The next season, he again helped lead the Bearcats to the 2016 NCAA Division I men's basketball tournament, where Cincinnati faced Saint Joseph's, and received a first-round elimination, in a controversial fashion, as Ellis' game-tying dunk was waved off for being 0.1 second too late.

[5] However, on March 18, three days before the team's first game, he left the Philippines to attend to an "important family matter".

[7] On December 29, 2017, Ellis left Enisey and joined Promitheas Patras, of the Greek Basket League.