Kamsar is a port city in Guinea, West Africa.

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.