|Number of teams||14|
|Levels on pyramid||1|
|Relegation to||Regional Divisions|
|League cup(s)||Cwpan Calbain|
CTFA Champions' League|
|Most championships||Pentyre Dragons (3)|
|2020–21 Gynghrair Gyntaf|
The Gynghrair Gyntaf is the highest, and only professional, association Football competition in Calbion. As of 2021, five seasons of the competition have been played. Since 1691, the Gynghrair Gyntaf is sponsored by Afal Aur Cider.
Football has been one of the most popular sports in Calbion for a long time, however no professional league was established until after the formation of the Calbain state. In 2014, the first group of clubs participated in the inaugural Gynghrair Gyntaf, which saw Pentyre Dragons win its first title. Since then, the league has become a starting board for many clubs to reach some international recognition. In addition, the Gynghrair Gyntaf has been the first professional league for several young and talented players that have moved on to become internationally renowned. After Calbion expanded its territory in 1691, the number of teams was increased from 10 to 14 to include the stronger teams from the new Talaithau.
The following clubs are participating in the 2020-2021 edition of the Gynghrair Gyntaf.
|1||Aberford Town||Aberford||Town's Lane||29,400|
|2||Aran Pirates||Aran||The Galleon||18,400|
|3||Arryn Rovers||Arryn||The Bucket||16,500|
|4||Arwyn Llysthur||Llysthur||Union Dome||58,000|
|5||Bryden Town||Bryden||Lawrence Sherrington Field||20,500|
|7||Kilkelly United||Kilkelly||Athenry Field||20,000|
|8||Pêl-droed Llysthur||Llysthur||Prince Arthur II Stadium||19,200|
|9||Pentyre City FC||Pentyre||Llywelyn Lewis Memorial Stadium||22,000|
|11||Porth Aerys Eagles||Porth Aerys||The Nest||19,200|
|12||Porth Edward FC||Porth Edward||Pawel Abraham Stadium||34,100|
|13||Southport Britannics||Southport||Whitehall Park||27,300|
|14||Ynyshir Athletic Club||Halwrach||Athletic Park||23,500|