# List of members of the Oireachtas imprisoned during the Irish revolutionary period

This is a list of members of the Oireachtas (National Parliament of Ireland) who served a prison sentence or were interned during the Irish revolutionary period (1916–23) in any jurisdiction before, during or after their time as a Teachta Dála (TD) or Senator.
Many were imprisoned as a result of their actions against the British Government in the lead-up to the formation of the Irish Free State in 1922. The list is ordered by first term of imprisonment.
| Name | Party | Term of office | Term of office | Prison time | Prison(s) | Reason | Notes |
| Liam Mellows | Anti-Treaty Sinn Féin | 1918 | 1922 | –1916 | Reading | Arrested under the Defence of the Realm Act 1914 | |
| Liam Mellows | Anti-Treaty Sinn Féin | 1918 | 1922 | 1917–18 | The Tombs | Attempting to aid the German side in World War I | |
| Liam Mellows | Anti-Treaty Sinn Féin | 1918 | 1922 | Jun–Dec 1922 | Mountjoy | Actions during the Irish Civil War | Executed in December 1922 |
| Gerald Boland | Anti-Treaty Sinn Féin, Fianna Fáil | 1923 | 1969 | 1916–17 | Frongoch | Interned for participating in 1916 Easter Rising | |
| Con Collins | Anti-Treaty Sinn Féin | 1918 | 1923 | 1916–17 | Frongoch | Interned for participating in 1916 Easter Rising | |
| Michael Collins | Pro-Treaty Sinn Féin | 1918 | Aug 1922 | 1916–17 | Frongoch | Interned for participating in 1916 Easter Rising | |
| Éamon de Valera | Anti-Treaty Sinn Féin, Fianna Fáil | Jul 1917 | Jun 1959 | 1916–17 | Dartmoor, Maidstone, Lewes | Interned for participating in 1916 Easter Rising | Sentenced to death, commuted to life imprisonment because of his U.S. citizenship |
| Éamon de Valera | Anti-Treaty Sinn Féin, Fianna Fáil | Jul 1917 | Jun 1959 | May 1918–Feb 1919 | Lincoln | Sedition | Escaped in February 1919 |
| Éamon de Valera | Anti-Treaty Sinn Féin, Fianna Fáil | Jul 1917 | Jun 1959 | 1923–24 | Arbour Hill | Actions during the Irish Civil War | |
| Éamon de Valera | Anti-Treaty Sinn Féin, Fianna Fáil | Jul 1917 | Jun 1959 | 1924 | Crumlin Road | Illegally entering Northern Ireland | Held for 1 month in Solitary confinement |
| Arthur Griffith | Pro-Treaty Sinn Féin | Jun 1918 | Aug 1922 | 1916–17 | Frongoch | Interned for participating in 1916 Easter Rising | |
| Diarmuid Lynch | Sinn Féin | 1918 | 1921 | 1916–17 | Pentonville | Interned for participating in 1916 Easter Rising | Sentenced to death, commuted to life imprisonment because of his U.S. citizenship |
| Pierce McCan | Sinn Féin | 1918 | Mar 1919 | 1916–17 | Reading | Interned for participating in 1916 Easter Rising | |
| Pierce McCan | Sinn Féin | 1918 | Mar 1919 | May 1918–Mar 1919 | Gloucester | Suspected involvement in the German Plot | Died in prison from influenza |
| Patrick O'Keeffe | Pro-Treaty Sinn Féin | 1918 | 1922 | ca. 1918 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad". |
| Bryan Cusack | Anti-Treaty Sinn Féin, Fianna Fáil | 1918 | 1923 | ca. 1918 | | | |
| Seán McGarry | Pro-Treaty Sinn Féin, Cumann na nGaedheal | 1921 | Oct 1924 | 1916–17 | Frongoch | Interned for participating in 1916 Easter Rising | |
| Seán McGarry | Pro-Treaty Sinn Féin, Cumann na nGaedheal | 1921 | Oct 1924 | May 1918–Feb 1919 | Lincoln | Conspiring with the German enemy | Escaped in February 1919 |
| Constance Markievicz | Sinn Féin, Fianna Fáil | 1918 | Jul 1927 | 1916–17 | Kilmainham | Interned for participating in 1916 Easter Rising | Sentenced to death, commuted to life imprisonment on account of her gender |
| Constance Markievicz | Sinn Féin, Fianna Fáil | 1918 | Jul 1927 | May 1918–Mar 1919 | Holloway | Suspected involvement in the German Plot | |
| Richard Mulcahy | Pro-Treaty Sinn Féin, Cumann na nGaedheal, Fine Gael | 1918 | 1961 | Apr–Dec 1916 | Frongoch | Interned for participating in 1916 Easter Rising | |
| Cathal Ó Murchadha | Sinn Féin | 1921 | Jun 1927 | 1916–17 | Frongoch | Interned for participating in 1916 Easter Rising | |
| Cathal Ó Murchadha | Sinn Féin | 1921 | Jun 1927 | 1922–23 | Curragh Camp | Actions during the Irish Civil War | |
| Alexander McCabe | Sinn Féin | 1918 | 1925 | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Art O'Connor | Sinn Féin | 1918 | 1923 | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Austin Stack | Sinn Féin | 1918 | 1927 | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Brian O'Higgins | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Desmond FitzGerald | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Ernest Blythe | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Fionán Lynch | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Frank Fahy | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Frank Lawless | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| J. J. Clancy | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| James Crowley | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| James Dolan | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| James Lennon | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Joseph MacBride | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Joseph MacDonagh | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Joseph McGrath | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Joseph McGuinness | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Laurence Ginnell | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Michael Colivet | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Paul Galligan | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Richard Hayes | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Seán Etchingham | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Seán MacEntee | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Seán O'Mahony | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Thomas Hunter | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| William Sears | Sinn Féin | 1918 | | 1919 | | Anti-British activity | Listed on the roll of the First Dáil as "imprisoned abroad" |
| Robert Barton | Sinn Féin | 1918 | 1923 | Feb–Mar 1919, Jan 1920–Jul 1921 | Mountjoy | Sedition | Escaped in March 1919 |
| Ada English | Sinn Féin | 1921 | 1922 | 1920 | Galway Gaol | Actions during the Irish War of Independence | Six months, released early |
| Frank Carty | Sinn Féin Fianna Fáil | 1921 | 1942 | 1920, 1921 | Sligo Gaol, Derry Gaol | Actions during the Irish War of Independence | Escaped from both prisons |
| Terence MacSwiney | Sinn Féin | 1918 | Oct 1920 | 1919; Aug–Oct 1920 | Brixton | Possession of seditious articles and documents | Died on hunger strike in October 1920 |
| Linda Kearns MacWhinney | Fianna Fáil | Apr 1938 | Jul 1938 | Nov 1920–Apr 1921 | Walton, Mountjoy | Possession of guns | Escaped in April 1921 |
| Seán Mac Eoin | Pro-Treaty Sinn Féin, Cumann na nGaedheal, Fine Gael | 1921 | 1965 | Mar–Aug 1921 | Mountjoy | Actions during the Irish War of Independence | Sentenced to death but later commuted |
| Seán MacBride | Clann na Poblachta | Oct 1947 | 1957 | 1922–23 | ? | Actions during the Irish Civil War | |
| Peadar O'Donnell | Sinn Féin | 1923 | Jun 1927 | 1922–24 | Mountjoy | Actions during the Irish Civil War | |