| Season | 2017 |
|---|---|
| Champions | Kilcoo (16th title) |
| Relegated | Ballymartin Bredagh |
| Winning Captains | Darragh O'Hanlon and Daryl Branagan |
| Man Of The Match | Dylan Ward |
| Winning Manager | Paul McIver |
← 2016 2018 → | |
The 2017 Down Senior Football Championship was the 109th official edition of Down GAA's premier gaelic football tournament for senior clubs in County Down. 16 teams compete with the winner representing Down in the Ulster Senior Club Football Championship.
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.