The tournament operated a double elimination format for the opening two rounds of the championship, with the winners and early round losers rejoining at the quarter final stage.
Kilcoo Owen Roe's were the defending champions after they defeated Clonduff 3-11 to 0-9 in the 2016 final. On 1 October 2017 they successfully defended their title to claim a "6 in a row" of Down S.F.C. titles when defeating Burren 0-13 to 0-11. The final was broadcast live on TG4.
An Ríocht return to the senior grade after claiming the Down I.F.C. title in 2016. Bredagh make their senior comeback after breaking into the top 15 ranked teams in the Down football leagues for 2016.
Ballymartin and Bredagh are relegated to the 2018 I.F.C. after finishing outside the top 15 ranked teams in the Down football leagues for 2017. They finished 9th and 5th (ranked 21st and 17th overall) respectively in Division 2. Rostrevor and Carryduff will replace them after finishing 2nd and 3rd (ranked overall 14th and 15th) respectively in the Down ACFL Division 2 in 2017. Loughinisland gained a reprieve from relegation after finishing overall ranked 16th, however due to Rostrevor claiming the I.F.C. title, they were permitted to remain senior.
Team changes
The following teams have changed division since the 2016 championship season.
To S.F.C. Promoted from 2016 Down Intermediate Football Championship An Ríocht – (IFC Champions) Bredagh – (IFL Champions)
From S.F.C. Relegated to 2017 Down Intermediate Football Championship Annaclone Rostrevor
Round 1
All 16 teams enter the competition in this round. The 8 winners progress to Round 2A while the 8 losers progress to Round 2B.
Ruairi Quinn 1-3, Johnny Bell, Sean Bell, Garret Trainor 1-1 each, Anthony Doherty (0-1f, 1 '45), Conor McGrady (0-2f), Jarlath Branagan (0-1f) 0-2 each, Taylor Louden and Neil Cunningham 0-1 each
Rory Burns 2-1, Gareth McKibben 1-3 (0-1f), Sean Dornan 1-2, David Gilmore 1-1, Donal McKibben (0-1f) and Liam McKibben 0-3 each, Daniel Morgan 0-2, Colm Flanagan and Sean Hardy 0-1 each
Pat Havern 0-3 (0-1f), Daniel McCarthy 0-2, Chris Quinn, Keelan Rice, Niall Madine 0-1 each
Dylan Ward and Eugene Branagan 1-0 each, Paul Devlin (0-1f) and Ceilum Doherty 0-2 each, Darragh O'Hanlon (0-1f), Martin Devlin, Conor Laverty 0-1 each
Ronan Murtagh 0-3f, Ruairi Campbell, Patrick Quinn (0-1f), Tiernan Rushe 0-1 each
Conor Óg O'Hagan 2-3, Stephen McConville 0-9 (0-7f), Conor Murray 1-0, Shane Ward 0-2, Paul Lively, Jayme Gribben, Charlie Carr, Aidan Carr, Rian Branagan 0-1 each
Conor Smyth 1-2, Mark Poland 0-7f, Conor Poland 0-2 (0-1f), Ryan Kelly 1-0, Michael Ireland 0-2 (0-1f), Cormac Poland 0-1,
21 August 2017 20:15 Round 2B
Loughinisland
1-11 – 0-13 (A.E.T.)
Glenn John Martin
St. Patrick's
Round 3
This is the final qualifier round. The four losing teams from round 2A (who won a match and lost a match) play the four winning teams from round 2B (who lost a match and won a match).
Peter Sheridan 1-0, David McKibben (0-5f) and Danny Savage (0-2f) 0-6 each, Peter Brannigan and Packie Downey 0-2 each, Marc Reid (1 '45), Niall O'Higgins, Luke Kelly 0-1 each
Niall Devlin 0-3, Keelan Rice and Oisin McEvoy 0-2 each, Philip Madine 0-1