Lesvi is a Roman Catholic titular bishopric in the former Roman Catholic province of Mauretania Sitifensis, suffragan of Sitifis, or Sétif, in modern Algeria. It is not, as is sometimes stated, the Island of Lesbos, which never was a titular bishopric, but possesses two titular archbishoprics: Mytilene and Methymna.
Of Lesvi we only know, from the "Itinerarium Antonini", that it was situated twenty-five miles from Tupusuctu or Tiklat, and eighteen miles from Horrea Aninici, now Ain-Roua, south of Béjaïa. The town, therefore, was on the Sava, i.e. the Oued-Bou-Sellam, but there are no remains to be seen.
- Annuario Pontificio 2013 (Libreria Editrice Vaticana 2013 ISBN 978-88-209-9070-1), p. 916