Maronite Catholic Eparchy of Zahleh (in Latin: Eparchia Mariamnensis Maronitarum) is an eparchy of the Maronite Church in Lebanon immediately subject to the Maronite Patriarch of Antioch.
It is currently ruled by Eparch Joseph Mouawad.
The eparchy includes the city and the territory of Zahleh in the Beqaa Valley, 45 kilometers east of Beirut, where is located the Saint Maron Cathedral.
The territory is divided into 33 parishes and in 2014 there were 50,000 Maronite Catholics.
The name Mariamnensis refers to the ancient Byzantine Diocese of Mariamne.