The Roman Catholic Diocese of Fenoarivo Atsinanana (Latin: Fenoariven(sis) – Atsinananen(sis)) is a diocese located in the city of Fenoarivo Atsinanana in the ecclesiastical province of Toamasina in Madagascar.

Its cathedral episcopal see is the Cathédrale Saint Maurice, in the city of Fenoarivo Atsinanana, Toamasina Province.

• October 30, 2000: Established as Diocese of Fenoarivo Atsinanana from the Metropolitan Archdiocese of Antsiranana

• Bishops of Fenoarivo Atsinanana(Roman rite)
  • Bishop Désiré Tsarahazana (October 30, 2000 - February 10, 2009), appointed Bishop of Toamasina; future Cardinal
  • Bishop Marcellin Randriamamonjy (February 10, 2009 – present)

• Roman Catholicism in Madagascar

• GCatholic.org
• Catholic Hierarchy

17°23′07″S 49°24′28″E / 17.3854°S 49.4077°E / -17.3854; 49.4077