Round 1 The winners of their respective first-round games went on to qualify for the second round, the losers were given a second chance in a backdoor system which gave them a place in the third round when they won their backdoor tie.
Round 2 Structure All teams in Round two who lost in the first round were drawn against each other in the second round in a phase known as the second round backdoor system. The losers of these backdoor games were knocked out of the championship and went on to play in the relegation playoffs. The winning teams from round one were paired with each other. The losers of these round two games progressed to the third round and the winning teams skipped a round and went on directly to the fourth round.
The Games The most notable fixture in this round was the defeat of Kilmacud Crokes by Round Towers. This made it more difficult for Kilmacud to retain their title, Kilmacud went straight to round 3 and Round Towers progressed to Round 4. Also, St Vincents and
St Oliver Plunketts were forced to a replay. The replay saw the return of
Alan Brogan to Dublin football after a few months on the sidelines. St Oliver Plunketts progressed to the fourth round and St Vincents had a tie against Parnells in the third round.
St Oliver Plunketts/Eoghan Ruadh,
Ballymun Kickhams, UCD, Raheny, St Judes, St Brigids A, Ballyboden St Endas progressed to the fourth round as they won their respective second-round games and hadn't lost a game so far in the championship. St Vincents, St Sylvesters, Lucan Sarsfields, Ballinteer St Johns, St Marks Naomh Mearnóg, Kilmacud Crokes and Erins Isle progressed to the third round despite losing their games as they were a winning team in the first round. Thomas Davis, Parnells, O'Tooles, Garda, Na Fianna, Naomh Olaf, St Marys and St Annes progressed to the third round as they won their respective second round ties. St Brigids 'B', Erins Hope, Whitehall Colmcille, Trinity Gaels, Clontarf, Naomh Barróg, Fingallians and St Maurs went on play to retain their senior status in the relegation section.
Round 3 Structure This draw was restricted by a rule that did not allow two clubs who have met earlier in the championship to meet again. Therefore, there was no chance of a repeat of a previous encounter. Round 3 consisted of sixteen teams: the eight losers from Round 2 plus the eight winners from the backdoor system. So it was eight games and the eight winners progressed to Round 4. St Vincents, Erins Isle, Na Fianna, O'Tooles, St Marys, Ballinteer St Johns, Lucan Sarsfields and Kilmacud Crokes progressed to the fourth round having won their respective games. Parnells, Garda, Naomh Mearnóg, St Sylvesters, St Marks, St Annes, Thomas Davis, and Naomh Olaf were knocked out of the competition for 2006, although they retained their senior status for the
2007 Dublin Senior Club Football Championship.
Round 4 The draw for the fourth round or the last 16 took place on 15 August. The draw was from the second-round winners - St Brigid's, UCD, Ballyboden St Enda's,
St Judes, Raheny,
St Oliver Plunkett's/Eoghan Ruadh, Round Towers Clondalkin and
Ballymun Kickhams and the third-round winners -
Kilmacud Crokes,
Ballinteer St John's, St Vincent's,
Na Fianna, O'Toole's, Erin's Isle, Lucan Sarsfields and St Mary's. The winners of the second round were drawn against the third-round winners; they were separated by two distinct lots meaning the second-round winners were kept apart from third-round winners in the fourth-round draw. The draw revealed a potential tie of the round between champions
Kilmacud Crokes and
Ballyboden St Endas. Round four saw the exit of Erin's Isle,
Ballinteer St John's,
Ballyboden St Endas,
Ballymun Kickhams, Raheny, O'Tooles, St Marys and
St Brigids. St Vincent's, Round Towers(Clondalkin),
St Oliver Plunketts/Eoghan Ruadh, Na Fianna, Lucan Sarsfields,
St Judes, UCD and tournament favourites
Kilmacud Crokes progressed to the last eight. ==Quarterfinals==