The 2025–26 Cymru Premier (; known as the JD Cymru Premier for sponsorship reasons) will be the 34th season of the Cymru Premier (formerly known as the Welsh Premier League), the highest football league within Wales since its establishment in 1992.
Overview.
The league will consist of twelve teams; the top ten teams from the previous season, one team promoted from the Cymru North, and one team promoted from the Cymru South. The New Saints will enter the season as defending champions (for the fourth consecutive season). This will be the final season featuring twelve teams, with the league set to expand to sixteen teams from 2026 to 2027. This is the first time that founding members Aberystwyth Town and Newtown, who were the only teams to have played in every season of the competition since its inception as the League of Wales in 1992, are not present, as both were relegated in the 2024–25 season.
The promoted teams will be 2024–25 Cymru North champions Colwyn Bay, who returned to the top tier at the first time of asking after being relegated in 2023–24, and 2024–25 Cymru South champions Llanelli Town, who return to the Cymru Premier for the first time since 2018–19.
Teams.
Changes.
The following teams changed division since the 2024–25 season.
Stadia and locations.
Notes:
Regular season.
League table.
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Championship Conference.
The top six teams from the regular season entered the Championship Conference, playing every other team in the group for the third and fourth time (once at home and once away). Results from the regular season were carried over into this round. 
Championship table.
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Play-Off Conference.
The bottom six teams from the regular season entered the Play-Off Conference, playing every other team in the group for the third and fourth time (once at home and once away). Results from the regular season were carried over into this round. 
Play-off table.
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Conference League play-off.
Teams placed 3rd–7th qualified for one-off play-off matches, with the winners earning the second spot in the UEFA Conference League first qualifying round; the higher-placed team per game received home advantage.
Matches.
Quarter-finals
Semi-final
Final