Olba or Olbe was an ancient city and bishopric in the Roman province of Isauria, in present-day southern Turkey. It is included in the Catholic Church's list of Latin titular sees.

Isauria, in ancient geography, is a rugged, isolated district in the interior of Asia Minor, of very different extent at different periods, but generally covering what is now the district of Bozkır and its surroundings in the Konya Province of Turkey, or the core of the Taurus Mountains. In its coastal extension it bordered on Cilicia.