The league consists of two Premier Divisions (East and West), which are ranked at Step 6 in the National League System.

Subject to applying, receiving the required ground grading and finishing high enough in the league table, one club from each Premier Division can be promoted to the Western League Premier Division each season.

As of 2022, six clubs have been promoted from the league – Buckland Athletic after finishing as runners-up in 2012, Plymouth Parkway after finishing as champions in 2018, Tavistock and Exmouth Town who were first and second in 2019, and Falmouth Town and Torpoint Athletic who finished as division champions in 2022.

The bottom three clubs from each Premier Division are liable to relegation to the nearest feeder league.

The League Cup competition is sponsored by Walter C Parson Funeral Directors and is called The Walter C Parson Cup.