The Faithful County came out on top despite an early red card.
Offaly struck a potentially fatal blow to Westmeath's championship hopes on Saturday.
Both counties needed victory after losing their opening Joe McDonagh Cup rounds last time.
It was Johnny Kelly's side that came out on top after an eventful contest that saw Jason Sampson red carded after 30 seconds, and a goal for both sides in the opening five minutes.
A late Dan Bourke goal eventually sealed a crucial victory for the Faithful County.
Killian Doyle led the scoring for the Lake County with 15 points, while Brian Duignan's 1-11 proved decisive for Offaly.
The final score was 2-23 to 1-20.
Kelly says Offaly will be appealing Sampson's red card.
He says says he's proud of his players,
Elsewhere in the Joe McDonagh, Laois continued their march to the final with a massive win over Meath 7-29 to 1-16.
While Kerry backed up their win over Westmeath last time out with a 26 point to 2-12 win over Down yesterday.
Our coverage is brought to you by Leahy Midlands Auctioneers, if you're thinking of buying or selling a property in Laois, Offaly or Westmeath - Get in touch with Your local auctioneer John Leahy, leahyauctioneers.ie
Reynolds Commercials Athlone, your Renault Truck Dealer in the Midlands, stocking new & used vans & truck vehicles along with over 30 years’ experience in our service department,
And O'Brien's Renault Mullingar! Exceed your expectations with the Renault Megane E-Tech 100% Electric, available now at O'Briens Renault Mullingar!
James Gormley Named On Irish Squad For FIBA EuroBasket Qualifiers
Portlaoise Panthers Suffer Tough Defeat In Super League
CCFL: St Peter's Extend Their Advantage At Top Of Premier Division
NFL: Relegation Firmly On The Cards For Offaly
Laois "Devastated" By Defeat Despite Delivering "Manliness" - Justin McNulty
Westmeath Ladies Bag First Win Of League Season
Big Camogie Wins for Westmeath and Laois Over The Weekend
Fitzgerald "Relieved" After Squeaking Past Kerry
NHL: Galway Prove Too Strong For Offaly
Former Laois And Offaly GAA Manager Honoured By An Garda Síochána
Athlone Town Make It Two Wins From Two In First Division
Lee Fitzpatrick Scores Try For Ireland U20s In England
NFL: Westmeath Move Closer To Promotion
Shane Lowry Finishes Strong In California
Westmeath Drifter Sets Sights On Success In 2026
Offaly’s Alex Dunne Joins Alpine’s Young Driver Programme
NHL: Laois And Kerry Clash In Division Two
Shane Lowry Cards Opening Round 73 At Genesis Invitational
Athlone Town Aiming For Back To Back League Wins