Leinster League Division One, as the name implies, is the first division of the Leinster League and started in the 1994/95 season. Suttonians, Co. Carlow, Arklow, Mullingar, Garda, Navan, Naas, Wexford Wanderers, Portlaoise, Dundalk and Enniscorthy entered the division through the qualifying matches in the 1993/1994 season. The number of teams in the division was reduced from 14 to 12 in the 2007/08 season, but this was reversed in the 2008/09 season.

2008/2009 Season

2008/2009 Table

2007/2008 Season

At the end of the season, Ashbourne were relegated to Division Two and Enniscorthy, Newbridge and Tullow were promoted, making it 14 teams once again for 2008/2009.

2007/2008 Table

2006/2007 Season

At the end of the season, Mullingar, Enniscorthy and Kilkenny were relegated to Division Two and Ashbourne and Wicklow were promoted. Naas won promotion to AIB Division Three.

2006/2007 Table

Past winners

Wins by club