The Faithful narrowly beat Kildare in yesterday's Division 2A final.
Offaly will play in Division One of the Allianz Hurling League next year.
The Faithful edged out Kildare by 24 points to 1-18 in yesterday's Division 2A final at Portlaoise.
In the Division 2B Final, Meath came out on top against Donegal by 20 points to 14.