The Sligo Under-21 Football Championship is an annual Gaelic Athletic Association competition between the Under-21 panels of the clubs in Sligo. Up to 2006 this was the Under-21 Championship, but a decision was taken to hold the Championship a year earlier (i.e. for Under-20s), therefore there were two Championships in 2006 - an Under-21 Championship (won by Ballymote), and the Under-20 competition, in which Tourlestrane defeated Eastern Harps in the final. No competition was held in 2014 as it was decided to re-instate the competition in its Under-21 format for 2015. An amalgamated team of Easkey / Enniscrone are the current champions (2019).

This article includes a list of references, related reading, or external links, but its sources remain unclear because it lacks inline citations. (October 2020)

Note - 1975-2006: Under-21, 2006–2013: Under-20, no competition in 2014, 2015-present: Under-21.

Note - 1998-2006: Under-21, 2006–present: Under-20.

• Sligo GAA 125 History (2010)
• Ocean FM article on 2021 u21 A final
• Independent Article on 2022 u21 A Final

• Official Sligo Website
• Sligo on Hoganstand
• Sligo Club GAA