Marmaritzana (Greek: Μαρμαριτζάνα) was a medieval Byzantine city and bishopric in Central Greece.
The exact site of the city is unknown, except that it lay in the upper valley of the Spercheios River, west of Neopatras (modern Ypati).
[1] The city is mostly unknown except for the fact that it was an episcopal see attested at least since the time of Byzantine emperor Leo VI the Wise (r. 886–912) until the 13th century.
[1] It may be identical with the see of Marmaritzion, mentioned in a single Notitia Episcopatuum of the 11th century as a suffragan of the Metropolis of Larissa.
[1] The see remains a titular bishopric of the Catholic Church[2] since its nominal restoration in 1933, as "Marmarizana".