| Marsassoum | |
| Settlement Type: | Town and commune |
| Total Type: | Town and commune |
| Pushpin Map: | Senegal |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Senegal |
| Subdivision Type: | Country |
| Subdivision Name: |  Senegal |
| Subdivision Type1: | Region |
| Subdivision Name1: | Ziguinchor |
| Subdivision Type2: | Department |
| Subdivision Name2: | Ziguinchor |
| Subdivision Type3: | Arrondissement |
| Subdivision Name3: | Marsassoum |
| Subdivision Type4: | Commune |
| Area Total Km2: | 3.599 |
| Population As Of: | 2023 census |
| Population Footnotes: | [1] |
| Population Total: | 9815 |
| Population Density Km2: | auto |
| Timezone: | GMT |
| Utc Offset: | +0 |
| Coordinates: | 12.8275°N -15.9806°W |
Marsassoum is a small town and seat of the Marsassoum Arrondissement in the Ziguinchor Region of Senegal, roughly from Ziguinchor. It lies on the bank of the Soungrougrou River.[2] In 2023 it had a population of 9,815.
During colonial times it was a centre of the slave trade. Children could be sold from 200 to 250 francs.[3] Today there are significant populations of Mandinka people living in the vicinity.[4]
On July 28, 2008, gendarmes opened fire on 10 demonstrators who had barricaded the roads in Marsassoum.[5]