Matam is the capital town of the Matam Region in north-east Senegal, and lies on the Sénégal River on the border with Mauritania. In the censu…Matam is the capital town of the Matam Region in north-east Senegal, and lies on the Sénégal River on the border with Mauritania. In the census of 2002, Matam had 14,620 inhabitants and in the 2023 census the population of the town had increased to 27,695.