The Roman Catholic Diocese of Porto Novo (Latin : Dioecesis Portus Novi) is a diocese located in the city of Porto-Novo in the ecclesiastical province of Cotonou in Benin.
Caritas Porto Novo is the social arm of the diocese.
The Cathedral of the diocese is Cathédrale Notre Dame de l’Immaculée Conception in Porto Novo.
6°28′19″N2°37′09″E / 6.47194°N 2.61917°E