Wales has been represented at the Junior Eurovision Song Contest in and . The Welsh participating broadcaster in the contest was Sianel Pedwar Cymru (S4C).
In 2018 and 2019, S4C selected its artist through the televised national final (), with the song selected internally. In both years, the competition was held at Venue Cymru in Llandudno.
Although Wales has English as a co-official language, their entries were sung primarily in Welsh due to being represented by a Welsh-language broadcaster.
Wales previously took part in the contest as part of the United Kingdom between and , with ITV being responsible for their participation. S4C had also shown interest in participating in the contest in Limassol, Cyprus, but in the end decided against participating.
S4C announced that they would debut in the contest on 9 May 2018. The country was represented by the song "" performed by Manw, placing last in a field of 20 songs with 29 points. Wales participated in the contest, represented by the song "" performed by Erin Mai and finished 18th with 35 points.
2019 was the last year Wales participated in the contest. S4C cited the COVID-19 pandemic as the reason for not participating in subsequent editions.
On 25 August 2022, the British Broadcasting Corporation (BBC) announced that the United Kingdom would return to the contest in after a sixteen-year absence.
On 16 November 2024, S4C confirmed that it did not participate in the 2024 contest due to the BBC's late withdrawal, leaving it with insufficient time to organise an entry and form a delegation. However, a spokesperson for S4C stated that there is a prospect for Welsh participation in 2025, with 2018 representative Manw calling for a return to the contest. Wales continued its absence in 2025.
The Welsh broadcaster, S4C, sent their own commentators to each contest in order to provide commentary in the Welsh language. Spokespersons were also chosen by the national broadcaster in order to announce the awarding points from Wales. The table below list the details of each commentator and spokesperson since 2018.