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. The local authority was Llanelli Borough Council when the county of Dyfed existed, but it has been under Carmarthenshire County Council since 1996.