Leinster League Division One
| Leinster League Division One |
| Founded |
| 1994 |
| Nation |
| Relegation To |
| Leinster League Division Two |
| Number of Teams |
| 14 |
| Current Champions |
| Cill Dara RFC |
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
- Boyne
- Cill Dara
- Dundalk
- Enniscorthy
- Garda
- Monkstown
- Navan
- Newbridge
- Portlaoise
- Seapoint
- Skerries
- Tullamore
- Tullow
- Wicklow
2007/2008 Season
- Ashbourne
- Boyne
- Cill Dara
- Dundalk
- Garda
- Monkstown
- Navan
- Portlaoise
- Seapoint
- Skerries
- Tullamore
- Wicklow
2006/2007 Season
- Boyne
- Cill Dara
- Dundalk
- Enniscorthy
- Garda
- Kilkenny
- Monkstown
- Mullingar
- Naas
- Navan
- Portlaoise
- Seapoint
- Skerries
- Tullamore
Past winners
- 1994/1995 Dundalk
- 1995/1996 Suttonians
- 1996/1997 Co Carlow
- 1997/1998 Naas
- 1998/1999 Barnhall
- 1999/2000 Naas
- 2000/2001 Navan
- 2001/2002 Kilkenny
- 2002/2003 Kilkenny
- 2003/2004 Seapoint RFC
- 2004/2005 Naas
- 2005/2006 Monkstown
- 2006/2007 Naas
- 2007/2008 Cill Dara
- 2008/2009 Navan
- 2009/2010 Seapoint RFC
Wins by club
- Naas
- Kilkenny
- Navan
- Seapoint RFC
- Barnhall
- Cill Dara
- Co Carlow
- Dundalk
- Monkstown
- Suttonians