| Jurisdiction: | Diocese |
| Grand-Bassam | |
| Latin: | Dioecesis Bassam Maioris |
| Country: | Côte d'Ivoire |
| Metropolitan: | Abidjan |
| Rite: | Latin Rite |
| Area Km2: | 8,354 |
| Population: | 962,886 |
| Population As Of: | 2004 |
| Catholics: | 230,841 |
| Catholics Percent: | 24.0 |
| Bishop: | Raymond Ahoua, F.D.P. |
| Emeritus Bishops: | Paul Dacoury-Tabley |
The Roman Catholic Diocese of Grand-Bassam (la|Bassam Maioris) is a diocese located in the city of Grand-Bassam in the ecclesiastical province of Abidjan in Côte d'Ivoire.
The Cathedral is the Cathédrale Sacré Cœur in Grand-Bassam.