The Scarlets (Welsh: Y Scarlets) are one of the four professional Welsh rugby union teams and are based in Llanelli, Wales. Their home ground is the Parc y Scarlets stadium. They play in the United Rugby Championship and in European Professional Club Rugby competitions. The club was originally named the Llanelli Scarlets but was renamed at the start of the 2008–09 rugby season.

The Llanelli Scarlets were founded in 2003, as one of the five (now four) regional teams created by the Welsh Rugby Union (WRU). The Scarlets are affiliated with a number of semi-professional and amateur clubs throughout the area, including Welsh Premier Division sides Llanelli RFC, Carmarthen Quins RFC and Llandovery RFC. Through the 2007–08 season, they played most of their games at Stradey Park in Llanelli, but they have also played matches at the Racecourse Ground in Wrexham. The club's new stadium, Parc y Scarlets (English: Scarlets Park), was constructed in nearby Pemberton, and opened in November 2008.

The Scarlets won the league twice: the initial 2003–04 Celtic League season, and the Pro12 in 2016–17, defeating Munster 46–22 in the 2017 Pro12 Grand Final.