Llanelli is a market town and the largest community in Carmarthenshire and the preserved county of Dyfed, Wales. It is located on the Loughor estuary 10.5 miles north-west of Swansea and 12 miles south-east of the county town, Carmarthen. The town had a population of 25,168 in 2011, estimated in 2019 at 26,225.