Mayoko DistrictMayoko District is a Districts of the [Republic of the Congo|district] in the Niari Department of Republic of the Congo. The capital lies at Mayoko. It has a northern border with Gabon. As of 2007, the population is 5,147.TransportMayoko is served by a branch railway of the Congo–Ocean Railway that terminates in Mbinda. It lies near the border with Gabon.MiningMayoko is near deposits of iron ore, which are very close to an existing railway line leading to a port.