CD Llanes was founded in 1949 and played its first 50 years in the Regional divisions. In 1999 the club achieves its first promotion ever to
Tercera División, where it played almost every season since that year. In 2009 and 2010, the club qualified for the promotion playoffs to
Segunda División B. In its
first attempt, Llanes was eliminated in the first round by
Alicante B after a
penalty shoot-out. Its
second participation was better, as they eliminated
Valladolid B in the first round, but they were beaten 6–0 by
Tudelano in the second leg of the second round. Llanes came back to the playoffs in 2018, but again failed in the first round. On 11 September 2019, the club won the
Copa Federación. ==Season to season==