A superb goal from Daniel Currams 13 minutes from time proved to be the decisive score as Kilcormac/Killoughey added the Intermediate Football title to their Senior Hurling crown.
Tullamore Court Hotel Intermediate Football Final
There was little between the sides throughout a close fought game and they were level at 2-6 apiece when Currams struck what turned out to be the match winning goal.
Beaten finalists in the Senior Championship in 2000, 2004 and 2007, Shamrocks were looking to escape the Intermediate ranks after suffering a controversial relegation in 2011.
They made a good start to the game and a goal from Packie Walsh midway through the half gave them a 1-3 to 0-2 lead.
Offaly senior hurler Conor Mahon struck back with a goal for Kilcormac/Killoughey and before half-time Ciaran Slevin added a second to leave his side 2-4 to 1-3 up at the break.
Shamrocks got right back into the game straight after half-time with a goal from Patrick Dunican. Scores were at a premium throughout the second-half and were locked at 2-6 apiece after 45 minutes.
Currams then struck for the game winning goal and while Shamrocks tried everything to get back on terms, they could only manage one further point as Kilcormac/Killoughey held on for the win.
Kilcormac/Killoughey will now represent Offaly in both the Leinster Club Senior Hurling Championship and the Leinster Club Intermediate Football Championship as they look to add more titles in what has already been a spectacular year.
As well as the two championship won, they were also unlucky to lose out in a thrilling Minor A Hurling Final and the Intermediate Hurling Final.
They also reached the semi-final of the U-21 Hurling Championship and the Junior Hurling Championship.
For Shamrocks, they now face another year in the Intermediate ranks however they will be boosted by the club winning their first ever Minor A Football title which will stand them in good stead in the years ahead.