Ntoum or Nkan is a town in Estuaire Province in northwestern Gabon
. It is the capital of the Komo-Mondah Department. Nkan lies along the N1 road and L106 road, 39.2 kilometres by road east of Libreville and 12.2 kilometres north of Nzamaligue. In the 1993 census it had a population of 6,188 and in 2012 has an estimated population of 11,754. It is served by Nkan Airport. It is located on the Trans-Gabon Railway and is the proposed junction for the line to the iron ore exporting port of Santa Clara. NToum has an integrated cement plant.