| Name | Position | Party | Constituency |
|---|---|---|---|
| Padraig Mac an Iomaire | Councillor | Unknown | Conamara South |
| Fiach Mac Conghail | Former Representative | Independent | |
| Mícheál Mac Donncha | Councillor | Sinn Féin | Donaghmede |
| Briege Mac Oscar | Councillor | Fianna Fáil | Ballymun - Finglas |
| Deaglán MacCanna | Former Representative | Renua Ireland | |
| Micheál Cholm MacGiolla Easbuig | Councillor | Independent | Glenties |
| Cormac MacKay | Former Representative | Direct Democracy Ireland - National Citizens Movement | |
| Conor MacLiam | Former Representative | Solidarity | |
| Padraig MacLochlainn | TD | Sinn Féin | Donegal |
| Chris MacManus | Councillor | Sinn Féin | Sligo-Strandhill |
| Sean MacManus | Former Representative | Sinn Féin | |
| Chris MacManus | Former Representative | Sinn Féin | |
| Marc MacSharry | TD | Fianna Fáil | Sligo-Leitrim |
| Tom MacSharry | Councillor | Fianna Fáil | Sligo-Strandhill |
| Tina MacVeigh | Councillor | People Before Profit | South West Inner City |
| Eoin Madden | Former Representative | Green Party | |
| Liam Madden | Councillor | Unknown | Mallow |
| Josepha Madigan | TD | Fine Gael | Dublin Rathdown |
| Manchán Magan | Former Representative | Green Party | |
| Seamus Maguire | Former Representative | Independent | |
| Grainne Maguire | Councillor | Independent | Balbriggan |
| Sinéad Maguire | Councillor | Fine Gael | Sligo-Strandhill |
| Ronan Maher | Former Representative | Green Party | |
| Michael Maher | Councillor | Fine Gael | Loughrea |
| Sean Maher | Former Representative | Sinn Féin | |
| John Maher | Councillor | Labour | Cork City North East |
| Seán Paul Mahon | Former Representative | Fianna Fáil | |
| Paul Mahon | Former Representative | People Before Profit | |
| Kieran Mahon | Councillor | Solidarity | Tallaght Central |
| Howard Mahony | Councillor | Fianna Fáil | Castleknock |