[1] The Connacht SFC is run on a knock-out basis through which teams are eliminated from the competition.

The winner and runner-up progresses directly to the All-Ireland SFC Group Stage.

[6] The competing counties play for the JJ Nestor Cup, which is presented to the winning captain on Connacht Final Day.

* = Rescheduled for 2025, after being postponed in 2020 due to the impact of the COVID-19 pandemic on Gaelic games are Roscommon v London and Galway v New York, for their first fixtures since 2015.

+ = Rescheduled for 2026, after being absent in 2021 for the same reason are Mayo v London and Roscommon v New York, for their first fixtures since 2016 (in rotation).

The most successful team of each decade, judged by number of Connacht SFC titles, is as follows: No county teamss have appeared in the final, being victorious on all occasions.