A full list has been announced by the province.
Birr native Peter Dooley is part of 28 players awarded with new senior contracts for next season.
Dooley has made 76 senior appearances for the province, scoring 2 tries in the process.
Rob Kearney and Fergus McFadden have also agreed short-term deals to stay with Leinster until the end of the current season.
Kearney and McFadden could remain until the 17th of October if the province reach the Heineken Champions Cup final.
McFadden is due to retire at the end of this season, although Kearney’s future plans remain unclear.