The tours take place each weekday at 10:30am and 2.30pm and last approximately 50 minutes.
Entrance is via the Kildare Street gate and visitors are advised to arrive 15 minutes before the start time.
The Oireachtas Joint Sub-Committee on Administration Chairman, Joe Carey TD, said: "Ireland has a rich parliamentary heritage that spans over 90 years and people taking this tour will experience some of that history and tradition as they walk through the iconic Leinster House building.
"Taking in the Dáil, Seanad and Committee Room public galleries, the tours offer a valuable insight into how our parliament works.
"I believe that it is vitally important for our democracy that the Irish public know and understand the role and functions of their parliament. We also look forward to welcoming to Leinster House those living outside the State during the busy holiday season."