2021 Connacht Senior Football Championship

The 2021 Connacht championship was contested by the five counties in the Irish province of Connacht. London and New York were withdrawn from the 2020 and 2021 Connacht championships as part of the impact of the COVID-19 pandemic on Gaelic games, due to international travel restrictions. There was a full open draw for the first time in more than 40 years. It took place on 19 April 2021. Sligo withdrew from the championship in 2020 but returned in 2021. London and New York returned in 2022 but games for 2021 not expected to take place until 2026.

Team	Colours	Sponsor	Manager	Captain	Most recent success
					All-Ireland	Provincial
Galway	Maroon and white	Supermac's	Pádraic Joyce	Shane Walsh	2001	2018
Leitrim	Green and gold	J. P. Clarke's Saloon, New York	Terry Hyland	Wayne McKeon		1994
London*	Green and white		Michael Maher
Mayo	Green and red	Intersport Elverys	James Horan	Aidan O'Shea	1951	2020
New York*	Red, white and blue
Roscommon	Blue and yellow	Ballymore	Anthony Cunningham	Enda Smith[1]	1944	2019
Sligo	Black and white	AbbVie	Tony McEntee	Keelan Cawley[2]		2007

|* = Due to the COVID-19 pandemic, on 11 December 2020, the GAA decided to cancel Roscommon hosting New York, On 8 April 2021, Mayo cancelled hosting London. They were both back for the 2022 campaign.

Two counties were randomly drawn to face each other in the quarter-finals. The lowest ranked county to play in the quarter-finals was Sligo of Division 4.

26 June 2021 16:30 Quarter-final	Mayo (2)	3-23 - 0-12	Sligo (4)	Markievicz Park, Sligo Attendance: 200 Referee: Paul Faloon (Down) Man of the Match: Aidan O'Shea (Breaffy)
	Aidan O'Shea 2-2, Darren McHale 1-5, Ryan O'Donoghue 0-5 (0-4f), Eoghan McLaughlin, Conor Loftus, Tommy Conroy 0-2 each, Patrick Durcan, Jordan Flynn, Fergal Boland, Stephen Coen, James Carr 0-1 each	Report	Niall Murphy 0-6 (0-1f), Sean Carrabine 0-2, Paddy O'Connor, Liam Gaughan, Mikey Gordon, Keelan Cawley 0-1 each

Three counties were given a bye to this stage and were joined by the winning team from quarter-final. The lowest ranked county to play in the semi-finals was Leitrim of Division 4.

4 July 2021 13:15 Semi-final	Galway (1)	2-11 - 0-12	Roscommon (1)	Dr. Hyde Park, Roscommon Attendance: 1,049 Referee: Joe McQuillan (Cavan) Man of the Match: Matthew Tierney (Oughterard)
	Matthew Tierney 1-3 (0-2f, 1 '45), Paul Kelly 1-2, Robert Finnerty and Shane Walsh (0-2f) 0-2 each, Sean Kelly and Damien Comer 0-1 each	Report	Enda Smith 0-3, Conor Daly and Donie Smith (1 '45) 0-2 each, Brian Stack, Conor Hussey, Ciaran Murtagh (0-1f), Diarmuid Murtagh, Cathal Cregg 0-1 each

11 July 2021 14:00 Semi-final	Mayo (2)	5-20 - 0-11	Leitrim (4)	MacHale Park, Castlebar Attendance: 3,500 Referee: Fergal Kelly (Longford) Man of the Match: Ryan O'Donoghue (Belmullet)
	Ryan O'Donoghue 1-6 (0-3f), Darren McHale 2-1, Darren Coen and Tommy Conroy 1-3 each, Matthew Ruane and Conor Loftus 0-2 each, Stephen Coen, Aidan O'Shea, James Carr 0-1 each	Report	Keith Beirne 0-5f, Conor Dolan and Riordan O'Rourke 0-2 each, Paddy Maguire and Evan Sweeney 0-1 each

25 July 2021 13:30 Final	Mayo	2-14 - 2-8	Galway	Croke Park, Dublin Attendance: 18,000 Referee: Conor Lane (Cork) Man of the Match: Matthew Ruane (Breaffy)
	Ryan O'Donoghue 1-3 (1-0 pen, 0-2f), Matthew Ruane 1-2, Conor Loftus and Tommy Conroy 0-2 each, Rob Hennelly (1 '45), Paddy Durcan, Darren McHale, Kevin McLoughlin, James Carr 0-1 each	Report	Shane Walsh 1-1, Matthew Tierney 0-4 (0-3f), Damien Comer 1-0, Paul Conroy 0-2, Cathal Sweeney 0-1

Mayo qualified for the 2021 All-Ireland SFC semi-finals.

• 2021 All-Ireland Senior Football Championship
  • 2021 Leinster Senior Football Championship
  • 2021 Munster Senior Football Championship
  • 2021 Ulster Senior Football Championship
• Impact of the COVID-19 pandemic on Gaelic games