The following table shows the composition by party when the 22nd Seanad first met on 12 September 2002.
| Name | Panel | | Party | Notes |
| Dooley, Timmy Timmy Dooley | Administrative Panel | | Fianna Fáil | Elected to Dáil at the 2007 general election |
| Feighan, Frank Frank Feighan | Administrative Panel | | Fine Gael | Elected to Dáil at the 2007 general election |
| Glynn, Camillus Camillus Glynn | Administrative Panel | | Fianna Fáil | |
| Kett, Tony Tony Kett | Administrative Panel | | Fianna Fáil | |
| McHugh, Joe Joe McHugh | Administrative Panel | | Fine Gael | Elected to Dáil at the 2007 general election |
| Tuffy, Joanna Joanna Tuffy | Administrative Panel | | Labour Party | Elected to Dáil at the 2007 general election |
| Wilson, Diarmuid Diarmuid Wilson | Administrative Panel | | Fianna Fáil | |
| Bradford, Paul Paul Bradford | Agricultural Panel | | Fine Gael | |
| Burke, Paddy Paddy Burke | Agricultural Panel | | Fine Gael | |
| Burke, Ulick Ulick Burke | Agricultural Panel | | Fine Gael | Elected to Dáil at the 2007 general election |
| Callanan, Peter Peter Callanan | Agricultural Panel | | Fianna Fáil | |
| Kiely, Rory Rory Kiely | Agricultural Panel | | Fianna Fáil | Cathaoirleach |
| Mansergh, Martin Martin Mansergh | Agricultural Panel | | Fianna Fáil | Elected to Dáil at the 2007 general election |
| O'Brien, Francis Francis O'Brien | Agricultural Panel | | Fianna Fáil | |
| O'Meara, Kathleen Kathleen O'Meara | Agricultural Panel | | Labour Party | |
| Phelan, John Paul John Paul Phelan | Agricultural Panel | | Fine Gael | |
| Scanlon, Eamon Eamon Scanlon | Agricultural Panel | | Fianna Fáil | Elected to Dáil at the 2007 general election |
| Walsh, Jim Jim Walsh | Agricultural Panel | | Fianna Fáil | |
| Coonan, Noel Noel Coonan | Cultural and Educational Panel | | Fine Gael | Elected to Dáil at the 2007 general election |
| Hayes, Brian Brian Hayes | Cultural and Educational Panel | | Fine Gael | Elected to Dáil at the 2007 general election |
| Mooney, Paschal Paschal Mooney | Cultural and Educational Panel | | Fianna Fáil | |
| Ó Murchú, Labhrás Labhrás Ó Murchú | Cultural and Educational Panel | | Fianna Fáil | |
| Ormonde, Ann Ann Ormonde | Cultural and Educational Panel | | Fianna Fáil | |
| Bannon, James James Bannon | Industrial and Commercial Panel | | Fine Gael | Elected to Dáil at the 2007 general election |
| Bohan, Eddie Eddie Bohan | Industrial and Commercial Panel | | Fianna Fáil | |
| Coghlan, Paul Paul Coghlan | Industrial and Commercial Panel | | Fine Gael | |
| Cox, Margaret Margaret Cox | Industrial and Commercial Panel | | Fianna Fáil | Party whip removed on 4 April 2007; thereafter sat as an independent |
| MacSharry, Marc Marc MacSharry | Industrial and Commercial Panel | | Fianna Fáil | |
| McDowell, Derek Derek McDowell | Industrial and Commercial Panel | | Labour Party | |
| Phelan, Kieran Kieran Phelan | Industrial and Commercial Panel | | Fianna Fáil | |
| Terry, Sheila Sheila Terry | Industrial and Commercial Panel | | Fine Gael | |
| White, Mary Mary White | Industrial and Commercial Panel | | Fianna Fáil | |
| Browne, Fergal Fergal Browne | Labour Panel | | Fine Gael | |
| Cummins, Maurice Maurice Cummins | Labour Panel | | Fine Gael | |
| Daly, Brendan Brendan Daly | Labour Panel | | Fianna Fáil | |
| Feeney, Geraldine Geraldine Feeney | Labour Panel | | Fianna Fáil | |
| Finucane, Michael Michael Finucane | Labour Panel | | Fine Gael | |
| Fitzgerald, Liam Liam Fitzgerald | Labour Panel | | Fianna Fáil | Left Fianna Fáil on 27 March 2007; thereafter sat as an Independent |
| Hanafin, John John Hanafin | Labour Panel | | Fianna Fáil | |
| Higgins, Jim Jim Higgins | Labour Panel | | Fine Gael | |
| Leyden, Terry Terry Leyden | Labour Panel | | Fianna Fáil | |
| Lydon, Don Don Lydon | Labour Panel | | Fianna Fáil | |
| McCarthy, Michael Michael McCarthy | Labour Panel | | Labour Party | |
| O'Toole, Joe Joe O'Toole | National University of Ireland | | Independent | |
| Quinn, Feargal Feargal Quinn | National University of Ireland | | Independent | |
| Ryan, Brendan Brendan Ryan | National University of Ireland | | Labour Party | |
| Henry, Mary Mary Henry | University of Dublin | | Independent | |
| Norris, David David Norris | University of Dublin | | Independent | |
| Ross, Shane Shane Ross | University of Dublin | | Independent | |
| Brady, Cyprian Cyprian Brady | Nominated by the Taoiseach | | Fianna Fáil | Elected to 30th Dáil at general election on 24 May 2007 |
| Brennan, Michael Michael Brennan | Nominated by the Taoiseach | | Fianna Fáil | Joined the Progressive Democrats on 29 April 2004 |
| Dardis, John John Dardis | Nominated by the Taoiseach | | Progressive Democrats | |
| Hayes, Maurice Maurice Hayes | Nominated by the Taoiseach | | Independent | |
| Kenneally, Brendan Brendan Kenneally | Nominated by the Taoiseach | | Fianna Fáil | Elected to 30th Dáil at general election on 24 May 2007 |
| Kitt, Michael Michael Kitt | Nominated by the Taoiseach | | Fianna Fáil | Elected to 30th Dáil at general election on 24 May 2007 |
| Minihan, John John Minihan | Nominated by the Taoiseach | | Progressive Democrats | |
| Morrissey, Tom Tom Morrissey | Nominated by the Taoiseach | | Progressive Democrats | |
| Moylan, Pat Pat Moylan | Nominated by the Taoiseach | | Fianna Fáil | |
| O'Rourke, Mary Mary O'Rourke | Nominated by the Taoiseach | | Fianna Fáil | Leader of the Seanad until her election to 30th Dáil on 24 May 2007 |
| Walsh, Kate Kate Walsh | Nominated by the Taoiseach | | Progressive Democrats | Died 24 April 2007 |
| O'Gorman, Colm Colm O'Gorman | Nominated by the Taoiseach | | Progressive Democrats | Nominated on 3 May 2007 to replace Kate Walsh |
| Cassidy, Donie Donie Cassidy | Nominated by the Taoiseach | | Fianna Fáil | Nominated on 23 June 2007 to replace Mary O'Rourke, who was elected to the 30th Dáil at the general election on 24 May 2007. |
| Dorgan, Seán Seán Dorgan | Nominated by the Taoiseach | | Fianna Fáil | Nominated on 23 June 2007 to replace Michael Kitt, who was elected to the 30th Dáil at the general election on 24 May 2007. |
| Sands, Peter Peter Sands | Nominated by the Taoiseach | | Fianna Fáil | Nominated on 23 June 2007 to replace Brendan Kenneally, who was elected to the 30th Dáil at the general election on 24 May 2007. |
| Wall, Chris Chris Wall | Nominated by the Taoiseach | | Fianna Fáil | Nominated on 23 June 2007 to replace Cyprian Brady, who was elected to the 30th Dáil at the general election on 24 May 2007 |