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.

Ireland Women's Team Look Forward To A World Cup Play Off After Beating Kazakhstan
Everton's Owners Consider Selling The Club
Kilkenny Goalkeeper Eoin Murphy Retires From Intercounty Hurling
Friday Morning Sports Update
Leixlip Youngster Looking Ahead To World Cup With Ireland's Wheelchair Rugby Team
Leinster Rugby Team To Play Cardiff This Weekend Named
Ramon Vega Hopes To Stand In Next Year's FIFA Presidential Election
Thursday Morning Sports Update