They beat Meath 2-19 to 1-15
The Louth footballers are the Dalata Hotel Group Leinster under-20 champions for the first time since 1981.
The Wee County were 2-19 to 1-15 winners over Meath in Newbridge last night.
Mayo claimed the honours in Connacht with a 2-17 to 4-8 win over Roscommon in Tuam.
Tyrone saw off Donegal in extra-time in the Ulster final, on a scoreline of 1-19 to 2-14 in Owenbeg.

Andy Farrell Names Ireland Team For Six Nations Game Against Italy
Thursday Morning Sports Update
Robbie Keane Insists He's Content Where He Is Amid Vacant Manger Job At Tottenham
Kildare’s Lauren Walsh Is Off To A Good Start At The Saudi Ladies International
It's Understood Tottenham Have Sacked Manager Thomas Frank
McIlroy States There Is No Need For Men's Golf Fifth Major Championship
Wednesday Morning Sports Update
John Fogarty Remains Hopeful For Ireland's Six Nations Game Against Italy