This is a list of members elected to the Irish House of Commons in 1661. The parliament sat until 1666 and consisted of almost 300 MPs at a time during this period.
| Name | Constituency | class=unsortable | Notes |
|---|---|---|---|
| Replace Richard Power who succeeded to a peerage in 1661 | |||
| County Monaghan | |||
| Kilmallock | |||
| Died 1665 and replaced by Roger Boyle. | |||
| County Cork | |||
| County Wicklow | Elected in 1666 to replace Folliott Wingfield | ||
| Dungannon | |||
| Tuam | Sat for Dungannon | ||
| Dungarvan | |||
| Baltinglass | |||
| Carlow | |||
| Died and replaced in 1662 by his son Francis Butler | |||
| Fore | Elected 1662 to replace Sir Timothy Tyrrill. Died 1663 and was replaced by John Forrest | ||
| Hillsborough | |||
| Replaced 1662 by George Lane, 1st Viscount Lanesborough. | |||
| Lanesborough | |||
| New Ross | |||
| Died and replaced 1662 by Henry Blennerhassett | |||
| County Kerry | |||
| Lisburn | |||
| Antrim Borough | Elected when the constituency was created in 1665 | ||
| Attorney-General for Ireland | |||
| Fethard (County Tipperary) | |||
| Dungarvan | |||
| Also elected for Mullingar | |||
| County Meath | |||
| Newtown Limavady | |||
| Banagher | |||
| County Donegal | |||
| By-election May 1661 | |||
| County Clare | |||
| Antrim Borough | Elected when the constituency was created in 1665 | ||
| Lisburn | Elected 1665 in place of Sir Edward Smith | ||
| Ballynakill | |||
| Ballyshannon | |||
| County Limerick | |||
| County Roscommon | |||
| Tuam | Elected 1665 to replace Robert Ormesby | ||
| Bannow | |||
| Killybegs | |||
| Ballynakill | |||
| Speaker and Prime Serjeant | |||
| Castlebar | Replaced William Rowse, who had been absent without leave | ||
| County Cork | Died 1665 and was replaced by John St Leger. | ||
| Inistioge | |||
| Mallow | |||
| Succeeded to peerage 1661 and replaced by James, Lord Annesley | |||
| Navan | |||
| Ratoath | Elected 1662 to replace Richard Boughton | ||
| County Galway | |||
| Mallow | |||
| Clonmel | |||
| Thomastown | |||
| Elected April 1661. Died May 1661. | |||
| Lisburn | Resigned in 1665 on appointment as Chief Justice of the Court of Common Pleas (Ireland) | ||
| Ardee | Replaced John Ruxton, who had been expelled | ||
| Askeaton | |||
| County Louth | |||
| Strabane | Expelled and replaced 1665 by Sir Peter Harvey | ||
| Ardee | Replaced John Chambers, who had been expelled | ||
| By-election May 1661 | |||
| Carlow | Solicitor-General for Ireland. Acted as Speaker, 1661-2, while the previous Speaker, Sir Audley Mervyn was in London. | ||
| Sligo Borough | |||
| Ennobled 1662 and replaced by Vere Essex Cromwell | |||
| Died 1661 and replaced by Sir John Perceval, 1st Baronet. | |||
| April 1661 - sat for County Wicklow | |||
| County Wicklow | Created Viscount Powerscourt in 1665 |