Neath is a market town and community situated in the Neath Port Talbot County Borough, Wales. The town had a population of 50,658 in 201…Neath is a market town and community situated in the Neath Port Talbot County Borough, Wales. The town had a population of 50,658 in 2011. The community of the parish of Neath had a population of 19,258 in 2011. Historically in Glamorgan, the town is located on the River Neath, seven miles east-northeast of Swansea.