| Kamsar | |
| Settlement Type: | Sub-prefecture and city |
| Pushpin Map: | Guinea |
| Pushpin Mapsize: | 300 |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Guinea |
| Subdivision Type: | Country |
| Subdivision Name: |  Guinea |
| Subdivision Name1: | Boke Region |
| Subdivision Type2: | Prefecture |
| Subdivision Name2: | Boké Prefecture |
| Leader Title: | Mayor |
| Leader Name: | Chérif Kibola Camara |
| Unit Pref: | Imperial |
| Population Density Km2: | auto |
| Coordinates: | 10.65°N -51°W |
Kamsar is a port city in Guinea, West Africa. It is also a Sub-prefecture of Guinea. It is located on the mouth of the Nunez River.
Port Kamsar handles significant part of the world's bauxite production. Ships calling Port Kamsar and going direct to the quay of Guinea Bauxite Company for loading bauxites are limited to length overall (LOA) 229m. Ship length restrictions led to appearance of the new dry bulk carrier categories - Kamsarmax.[1]
It has a standard gauge railway line feeding bauxite from the mine at Sangarédi to the port.
The city is served by Kawass Airport.
Kamsar has a tropical monsoon climate (Am) with little to no rainfall from December to April and heavy to extremely heavy rainfall from June to October with moderate rainfall in May and November.----
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