| Mers Sultan | |
| Native Name: | مرس السلطان |
| Settlement Type: | Arrondissement of Casablanca |
| Pushpin Map: | Morocco Greater Casablanca |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Greater Casablanca |
| Pushpin Mapsize: | 300 |
| Subdivision Type: | Country |
| Subdivision Name: |  Morocco |
| Subdivision Type1: | Region |
| Subdivision Name1: | Casablanca-Settat |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Casablanca |
| Subdivision Type3: | District |
| Subdivision Name3: | Al Fida - Mers Sultan |
| Population As Of: | 2004 |
| Population Total: | 145928 |
| Utc Offset: | +0 |
| Timezone Dst: | WEST |
| Utc Offset Dst: | +1 |
| Coordinates: | 33.5742°N -7.6314°W |
Mers Sultan (Arabic: مرس السلطان)[1] is an arrondissement of Casablanca, in the Al Fida - Mers Sultan district of the Casablanca-Settat region of Morocco. As of 2004 it had 145,928 inhabitants.[2]
Groupe Scolaire Louis Massignon, a French international school, maintains one of its primary school campuses in Mers Sultan.[3]