# Dublin University (constituency)

Dublin University is a university constituency in Ireland, which elects three senators to Seanad Éireann, the senate of the Oireachtas (the legislature of Ireland). Its electorate comprises the undergraduate scholars and graduates of the University of Dublin, whose sole constituent college is Trinity College Dublin, so it is often also referred to as the Trinity College constituency. Between 1613 and 1937 it elected MPs or TDs to a series of representative legislative bodies.

## Representation

| From | To | Chamber | Members |
| 1613 | 1800 | House of Commons of Ireland | 2 |
| 1801 | 1832 | House of Commons of the United Kingdom | 1 |
| 1832 | 1922 | House of Commons of the United Kingdom | 2 |
| 1921 | 1922 | House of Commons of Southern Ireland | 4 |
| 1922 | 1923 | Dáil Éireann | 4 |
| 1923 | 1937 | Dáil Éireann | 3 |
| 1938 | present | Seanad Éireann | 3 |

### House of Commons of Ireland (1613–1800)

When James I first convened the Parliament of Ireland, the University of Dublin was given two MPs, elected by the Provost, Fellows and Scholars of Trinity College. It was not represented among the 30 Irish MPs which were part of the Protectorate Parliament during the Commonwealth of England, Scotland and Ireland.
Party organisations were not persistent during this time period, and have been added where appropriate. Among the MPs for the university in this period was John FitzGibbon, who later as Lord Chancellor of Ireland played a key role in the passage of the Acts of Union 1800, which merged the Kingdom of Ireland with the Kingdom of Great Britain to create the United Kingdom of Great Britain and Ireland.
| Parliament | Election | MP (Party) | MP (Party) | MP (Party) | MP (Party) |
| Parliament of James I | 1613 | William Temple | William Temple | Charles Doyne | Charles Doyne |
| Parliament of James I | 1628 | William Bedell | William Bedell | James Donnellan | James Donnellan |
| Parliament of James I | 1628 | William Fitzgerald | William Fitzgerald | | James Donnellan | James Donnellan |
| First Parliament of Charles I | 1634 | Sir James Ware | Sir James Ware | | James Donnellan | James Donnellan |
| Second Parliament of Charles I | 1639 | Sir James Ware | Sir James Ware | William Gilbert | William Gilbert |
| First Protectorate Parliament | 1654 | University not represented | University not represented | University not represented | University not represented |
| Parliament of Charles II | 1661 | Sir James Ware | Sir James Ware | John Butler | John Butler |
| Parliament of James II | 1689 | Sir John Meade, Bt | Sir John Meade, Bt | Joseph Coghlan | Joseph Coghlan |
| First Parliament of William III and Mary II | 1692 | Sir Cyril Wyche | Sir Cyril Wyche | | William Molyneux (Whig) |
| Second Parliament of William III | 1695 | Richard Aldworth | Richard Aldworth | | | William Molyneux (Whig) |
| Second Parliament of William III | 1698 | Richard Aldworth | Richard Aldworth | William Crow | William Crow |
| First Parliament of Anne | 1703 | Sir William Robinson | Sir William Robinson | Edward Southwell | Edward Southwell |
| Second Parliament of Anne | 1713 | | Marmaduke Coghill (Whig) | John Elwood | John Elwood |
| Parliament of George I | 1715 | | Marmaduke Coghill (Whig) | Samuel Dopping | Samuel Dopping |
| Parliament of George I | 1721 | | Marmaduke Coghill (Whig) | Edward Hopkins | Edward Hopkins |
| Parliament of George II | 1727 | | Marmaduke Coghill (Whig) | Samuel Molyneux | Samuel Molyneux |
| Parliament of George II | 1728 | | Marmaduke Coghill (Whig) | John Elwood | John Elwood |
| Parliament of George II | 1739 | Philip Tisdall | Philip Tisdall | | John Elwood | John Elwood |
| Parliament of George II | 1741 | Philip Tisdall | Philip Tisdall | Archibald Acheson | Archibald Acheson |
| First Parliament of George III | 1761 | Philip Tisdall | Philip Tisdall | William Clement | William Clement |
| Second Parliament of George III | 1768 | Philip Tisdall | Philip Tisdall | Sir Capel Molyneaux, Bt | Sir Capel Molyneaux, Bt |
| Third Parliament of George III | 1776 | | Walter Burgh (Patriot) | Richard Hely-Hutchinson | Richard Hely-Hutchinson |
| Third Parliament of George III | 1778 | | Walter Burgh (Patriot) | John FitzGibbon | John FitzGibbon |
| Third Parliament of George III | 1782 | | Lawrence Parsons (Patriot) | John FitzGibbon | John FitzGibbon |
| Fourth Parliament of George III | 1783 | | Lawrence Parsons (Patriot) | Arthur Browne | Arthur Browne |
| Fifth Parliament of George III | 1790 | Francis Hely-Hutchinson | Francis Hely-Hutchinson | | Arthur Browne | Arthur Browne |
| Sixth Parliament of George III | 1797 | George Knox | George Knox | | Arthur Browne | Arthur Browne |
* ↑ Election deemed invalid.

### House of Commons of the United Kingdom (1801–1922)

The Acts of Union 1800 merged the Parliament of Ireland with the Parliament of Great Britain, to form the Parliament of the United Kingdom. The 300 seats in the Irish House of Commons were reduced to 100 Irish members in the House of Commons of the United Kingdom. The union took effect on 1 January 1801. The University of Dublin had one seat in this Parliament. There was no new election for the First Parliament of the United Kingdom: for constituencies like the University of Dublin which were reduced to one MP, they were chosen by lot, in this instance, George Knox.
In the Representation of the People (Ireland) Act 1832, the university was given a second seat in Parliament, elected by plurality-at-large, and the franchise was extended to all those with a Master of Arts degree. At this stage, there were 2,073 voters on the register. Plural voting, by those who held a vote in the university constituency and also in a geographical one, was allowed and prevalent.
A Topographical Directory of Ireland, published in 1837, describes the parliamentary history of the university.
   By charter of James I. the university returned two members to the Irish parliament till the Union; after which time it returned only one member to the Imperial parliament, till the recent Reform act, since which it has returned two. The right of election, which was originally vested solely in the provost, fellows, and scholars, has, by the same act, been extended to all members of the age of 21 years, who had obtained, or should hereafter obtain, a fellowship, scholarship, or the degree of Master of Arts, and whose names should be on the college books : members thus qualified, who had removed their names from the books, were allowed six months to restore them, on paying a fee of £2, and such as continued their names, merely to qualify them to vote, pay annually to the college the sum of £1, or a composition of £5 in lieu of annual payment. The number of names restored under this provision was 3005, and at present the constituency amounts to 3135. The provost is the returning officer.
The Representation of the People Act 1918 extended the electorate to include all male graduates and scholars over the age of 21 and all female graduates and scholars over the age of 30, to be elected by single transferable vote. There were 4,541 voters registered for the 1918 general election. Plural voting continued to be allowed.
During the period of the Union between Ireland and Great Britain, the constituency predominantly elected Tory, Conservative and Unionist MPs, including Edward Gibson, who was later (as Lord Ashbourne) responsible for the Purchase of Land (Ireland) Act 1885, and Edward Carson, who led the Irish Unionist Alliance.
Dublin University was represented in the House of Commons until the dissolution of Parliament on 26 October 1922, shortly before the establishment of the Irish Free State became a dominion on 6 December 1922.
| Election | MP (Party) | MP (Party) | MP (Party) |
| 1801 | George Knox (T) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1802 | George Knox (T) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1806 | George Knox (T) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1807 | John Leslie Foster (T) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1812 | William Plunket (W) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1818 | William Plunket (W) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1820 | William Plunket (W) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1822 by-election | William Plunket (W) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1826 | William Plunket (W) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1827 by-election | John Wilson Croker (T) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1830 | Thomas Lefroy (T, C) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1831 | Thomas Lefroy (T, C) | University represented by one seat until 1832 | University represented by one seat until 1832 |
| 1832 | Thomas Lefroy (T, C) | | Frederick Shaw (T, C) |
| 1835 | Thomas Lefroy (T, C) | | Frederick Shaw (T, C) |
| 1837 | Thomas Lefroy (T, C) | | Frederick Shaw (T, C) |
| 1841 | Thomas Lefroy (T, C) | | Frederick Shaw (T, C) |
| 1842 by-election | Joseph Jackson (C) | | Frederick Shaw (T, C) |
| 1843 by-election | George Hamilton (C) | | Frederick Shaw (T, C) |
| 1847 | George Hamilton (C) | | Frederick Shaw (T, C) |
| 1848 by-election | George Hamilton (C) | | Joseph Napier (C) |
| 1852 by-election | George Hamilton (C) | | Joseph Napier (C) |
| 1852 | George Hamilton (C) | | Joseph Napier (C) |
| 1857 | George Hamilton (C) | | Joseph Napier (C) |
| 1858 by-election | George Hamilton (C) | | Anthony Lefroy (C) |
| 1859 by-election | James Whiteside (C) | | Anthony Lefroy (C) |
| 1859 | James Whiteside (C) | | Anthony Lefroy (C) |
| 1865 | James Whiteside (C) | | Anthony Lefroy (C) |
| 1866 by-election | John Walsh (C) | | Anthony Lefroy (C) |
| 1867 by-election | Hedges Chatterton (C) | | Anthony Lefroy (C) |
| 1867 by-election | Robert Warren (C) | | Anthony Lefroy (C) |
| 1868 | John Ball (C) | | Anthony Lefroy (C) |
| 1870 by-election | John Ball (C) | | David Plunket (C, U) |
| 1874 | John Ball (C) | | David Plunket (C, U) |
| 1874 by-election | John Ball (C) | | David Plunket (C, U) |
| Jan. 1875 by-election | Edward Gibson (C) | | David Plunket (C, U) |
| Feb. 1875 by-election | Edward Gibson (C) | | David Plunket (C, U) |
| 1877 by-election | Edward Gibson (C) | | David Plunket (C, U) |
| 1880 | Edward Gibson (C) | | David Plunket (C, U) |
| 1885 by-election | Hugh Holmes (C, U) | | David Plunket (C, U) |
| 1885 | Hugh Holmes (C, U) | | David Plunket (C, U) |
| 1886 | Hugh Holmes (C, U) | | David Plunket (C, U) |
| 1886 by-election | Hugh Holmes (C, U) | | David Plunket (C, U) |
| 1887 by-election | Dodgson Madden (U) | | David Plunket (C, U) |
| 1888 by-election | Dodgson Madden (U) | | David Plunket (C, U) |
| 1892 | Edward Carson (U) | | David Plunket (C, U) |
| 1895 | Edward Carson (U) | | David Plunket (C, U) |
| 1895 by-election | Edward Carson (U) | | W. E. H. Lecky (Lib U) |
| 1900 | Edward Carson (U) | | W. E. H. Lecky (Lib U) |
| 1903 by-election | Edward Carson (U) | | James Campbell (U) |
| 1906 | Edward Carson (U) | | James Campbell (U) |
| Jan. 1910 | Edward Carson (U) | | James Campbell (U) |
| 1900 by-election | Edward Carson (U) | | James Campbell (U) |
| Dec. 1910 | Edward Carson (U) | | James Campbell (U) |
| 1916 by-election | Edward Carson (U) | | James Campbell (U) |
| Feb. 1917 by-election | Edward Carson (U) | | Arthur Samuels (U) |
| Oct. 1917 by-election | Edward Carson (U) | | Arthur Samuels (U) |
| 1918 | Robert Woods (Ind U) | | Arthur Samuels (U) |
| 1919 by-election | Robert Woods (Ind U) | | William Jellett (U) |

### House of Commons of Southern Ireland (1921–1922)

The Government of Ireland Act 1920 established a devolved home rule legislature, within the United Kingdom, for twenty-six Irish counties which were designated Southern Ireland.
Dublin University was given four seats in the House of Commons of Southern Ireland. The seats were filled by Independent Unionist MPs who were returned unopposed. They were the only MPs who attended the abortive first meeting of the House. After the signing of the Anglo-Irish Treaty, the four MPs met with the Pro-Treaty members of the Second Dáil to ratify the Treaty. The Parliament was formally dissolved as part of the arrangements under the Treaty and the establishment of the Irish Free State on 6 December 1922.

### Dáil Éireann (1918–1937)

Sinn Féin contested the 1918 Westminster election on the basis that they would not take seats in the United Kingdom Parliament but would establish a revolutionary assembly in Dublin.
The university was entitled to return two Teachtaí Dála (known in English as Deputies and abbreviated as TDs) in 1918 to serve in the Irish Republic's First Dáil. This revolutionary body assembled on 21 January 1919.
In republican theory every MP elected in Ireland, including the two Unionist MPs from Dublin University, was a member of the First Dáil. In practice only Sinn Féin members participated.
The First Dáil passed a motion at its last meeting on 10 May 1921, the first three parts of which make explicit the republican view:
* That the Parliamentary elections which are to take place during the present month be regarded as elections to Dáil Éireann.
* That all deputies duly returned at these elections be regarded as members of Dáil Éireann and allowed to take their seats on subscribing to the proposed Oath of Allegiance.
* That the present Dáil dissolve automatically as soon as the new body has been summoned by the President and called to order.
The Second Dáil first met on 16 August 1921, thereby dissolving the First Dáil.
Sinn Féin used the polls for the Northern Ireland House of Commons and the House of Commons of Southern Ireland as an election for the Irish Republic's Second Dáil. No actual voting was necessary in Southern Ireland as all the seats were filled by unopposed returns. Except for this university all other constituencies elected Sinn Féin TDs. The university elected four Independent Unionist members unopposed. As with the First Dáil, those Deputies could have joined the Dáil if they chose.
The Third Dáil elected in 1922 was, in United Kingdom law, the constituent assembly for the Irish Free State. From this time the Dáil represented only the twenty-six Irish counties and not the six counties of Northern Ireland. Non-Sinn Féin Deputies, including those from the university, began to participate in the Dáil.
In the Electoral Act 1923, the Irish Free State defined its own Dáil constituencies. The University of Dublin was granted three seats, to be elected by single transferable vote by all graduates and scholars, regardless of sex, over the age of 21. Plural voting was not allowed.
The Constitution (Amendment No. 23) Act 1936, removed the provisions in Constitution of the Irish Free State for University representation in Dáil Éireann, with effect from the next dissolution of the Oireachtas, which took place on 14 June 1937. Voters resident in the State had their Dáil registration switched to the geographical constituency of their registered address.

#### TDs

Teachtaí Dála (TDs) for Dublin University 1918–1937{{{refs}}} :
| Key to parties  Ind U = Ind. Unionist  Ind = Independent  U = Irish Unionist ||||||||||
| Dáil | Election | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) | Deputy (Party) |
| 1st | 1918 | | Arthur Samuels (U) | | Robert Woods (Ind U) | 2 seats under 1918 Act | 2 seats under 1918 Act | 2 seats under 1918 Act | 2 seats under 1918 Act |
| 1st | 1919 by-election | | William Jellett (U) | | Robert Woods (Ind U) | 2 seats under 1918 Act | 2 seats under 1918 Act | 2 seats under 1918 Act | 2 seats under 1918 Act |
| 2nd | 1921 | | Ernest Alton (Ind U) | | James Craig (Ind U) | | William Thrift (Ind U) | | Gerald Fitzgibbon (Ind U) |
| 3rd | 1922 | | Ernest Alton (Ind) | | James Craig (Ind) | | William Thrift (Ind) | | Gerald Fitzgibbon (Ind) |
| 4th | 1923 | | Ernest Alton (Ind) | | James Craig (Ind) | | William Thrift (Ind) | 3 seats from 1923 | 3 seats from 1923 |
| 5th | 1927 (Jun) | | Ernest Alton (Ind) | | James Craig (Ind) | | William Thrift (Ind) | 3 seats from 1923 | 3 seats from 1923 |
| 6th | 1927 (Sep) | | Ernest Alton (Ind) | | James Craig (Ind) | | William Thrift (Ind) | 3 seats from 1923 | 3 seats from 1923 |
| 7th | 1932 | | Ernest Alton (Ind) | | James Craig (Ind) | | William Thrift (Ind) | 3 seats from 1923 | 3 seats from 1923 |
| 8th | 1933 | | Ernest Alton (Ind) | | James Craig (Ind) | | William Thrift (Ind) | 3 seats from 1923 | 3 seats from 1923 |
| 8th | 1933 by-election | | Ernest Alton (Ind) | | Robert Rowlette (Ind) | | William Thrift (Ind) | 3 seats from 1923 | 3 seats from 1923 |
Note: The columns in this table are used only for presentational purposes, and no significance should be attached to the order of columns. For details of the order in which seats were won at each election, see the detailed results of that election.

### Seanad Éireann (1938 to present)

Article 18.4 of the Constitution of Ireland adopted in 1937, provided that the university would have three seats in the new Seanad Éireann. The Seanad Electoral (University Members) Act 1937 gave effect to the constitutional provision, and provided that they would be elected by single transferable vote. The first Seanad election took place in 1938, and thereafter elections to the Seanad take place within 90 days of the dissolution of the Dáil. The Seventh Amendment of the Constitution, adopted in 1979, allows for a redistribution of the six university seats among the University of Dublin, the National University of Ireland, and any other institutions of higher education in the State which do not have representation.
Under the Seanad Electoral (University Members) (Amendment) Act 2024, the 2025 Seanad election to the 27th Seanad will be the last general election for the National University and the Dublin University constituencies. Polls for this election will close on 29 January 2025. At any Seanad general election held after 31 March 2025, they will be substituted by a new six-seat Higher Education constituency, enfranchising graduates from all institutions of higher education recognised under the Higher Education Act 2022. If a vacancy occurs during the 27th Seanad in the Dublin University constituency, the electorate will be Dublin University graduates on the Higher Education constituency register of electors.
The electorate is Irish citizens who have received a degree from the university, or undergraduates who have been awarded a foundation scholarship or non-foundation scholarship at Trinity College. After the Fourth Amendment in 1972, the age of eligibility was lowered from 21 to 18. Voting for the Seanad is distinct from that for the Dáil, so it is not considered plural voting; however, plural voting is possible for those who have received degrees from both the University of Dublin and the National University of Ireland. Trinity College Dublin is the sole constituent college of the University of Dublin, so the electorate is predominantly composed of graduates of Trinity; however, from 1975 to 1998, the University of Dublin also awarded the degrees of graduates at the Dublin Institute of Technology.
Nominations are by electors in their personal capacity; unlike Dáil elections, there is no provision for nomination by parties. Most of the senators for the constituency have campaigned as Independents, though Mary Robinson and Ivana Bacik took the Labour Party whip for periods of their time in the Seanad.
A number of the senators have had a reputation as being quite socially liberal, including Owen Sheehy-Skeffington, Noël Browne, and Catherine McGuinness. Three Senators were later appointed to the Supreme Court: T. C. Kingsmill Moore, Gardner Budd and Catherine McGuinness. Mary Robinson, first elected in 1969, was later elected as President of Ireland in 1990. In 1987, David Norris became the first openly gay member of either house of the Oireachtas. The senators have often included current or recent academics within Trinity College, such as professor of Latin and provost Ernest Alton, professor of Greek William Bedell Stanford, professor of mathematics Trevor West, professor of medicine Mary Henry, Ivana Bacik in law, and David Norris in English.
Senators for Dublin University 1938–present :
| Key to parties  Ind = Independent  Lab = Labour ||||||||
| Sen | Election | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) | Senator (Party) |
| 2nd | 1938 | | Ernest Alton (Ind) | | Joseph Johnston (Ind) | | Robert Rowlette (Ind) |
| 3rd | 1938 | | Ernest Alton (Ind) | | Joseph Johnston (Ind) | | Robert Rowlette (Ind) |
| 4th | 1943 | | T. C. Kingsmill Moore (Ind) | | William Fearon (Ind) | | Robert Rowlette (Ind) |
| 5th | 1944 | | T. C. Kingsmill Moore (Ind) | | William Fearon (Ind) | | Joseph Johnston (Ind) |
| 5th | 1947 | | Joseph Bigger (Ind) | | William Fearon (Ind) | | Joseph Johnston (Ind) |
| 6th | 1948 | | Joseph Bigger (Ind) | | William Fearon (Ind) | | William Stanford (Ind) |
| 7th | 1951 | | Gardner Budd (Ind) | | William Fearon (Ind) | | William Stanford (Ind) |
| 7th | 1952 | | William Jessop (Ind) | | William Fearon (Ind) | | William Stanford (Ind) |
| 8th | 1954 | | Owen Sheehy-Skeffington (Ind) | | William Fearon (Ind) | | William Stanford (Ind) |
| 9th | 1957 | | Owen Sheehy-Skeffington (Ind) | | William Fearon (Ind) | | William Stanford (Ind) |
| 9th | 1960 | | Owen Sheehy-Skeffington (Ind) | | William Jessop (Ind) | | William Stanford (Ind) |
| 10th | 1961 | | John Ross (Ind) | | William Jessop (Ind) | | William Stanford (Ind) |
| 11th | 1965 | | Owen Sheehy-Skeffington (Ind) | | William Jessop (Ind) | | William Stanford (Ind) |
| 12th | 1969 | | Owen Sheehy-Skeffington (Ind) | | William Jessop (Ind) | | Mary Robinson (Ind) |
| 12th | 1970 | | Trevor West (Ind) | | William Jessop (Ind) | | Mary Robinson (Ind) |
| 13th | 1973 | | Trevor West (Ind) | | Noël Browne (Ind) | | Mary Robinson (Ind) |
| 14th | 1977 | | Trevor West (Ind) | | Conor Cruise O'Brien (Ind) | | Mary Robinson (Lab) |
| 14th | 1979 | | Trevor West (Ind) | | Catherine McGuinness (Ind) | | Mary Robinson (Lab) |
| 15th | 1981 | | Shane Ross (Ind) | | Catherine McGuinness (Ind) | | Mary Robinson (Lab) |
| 16th | 1982 | | Shane Ross (Ind) | | Trevor West (Ind) | | Mary Robinson (Lab) |
| 17th | 1983 | | Shane Ross (Ind) | | Catherine McGuinness (Ind) | | Mary Robinson (Lab) |
| 18th | 1987 | | Shane Ross (Ind) | | David Norris (Ind) | | Mary Robinson (Ind) |
| 19th | 1989 | | Shane Ross (Ind) | | David Norris (Ind) | | Carmencita Hederman (Ind) |
| 20th | 1993 | | Shane Ross (Ind) | | David Norris (Ind) | | Mary Henry (Ind) |
| 21st | 1997 | | Shane Ross (Ind) | | David Norris (Ind) | | Mary Henry (Ind) |
| 22nd | 2002 | | Shane Ross (Ind) | | David Norris (Ind) | | Mary Henry (Ind) |
| 23rd | 2007 | | Shane Ross (Ind) | | David Norris (Ind) | | Ivana Bacik (Ind) |
| 24th | 2011 | | Sean Barrett (Ind) | | David Norris (Ind) | | Ivana Bacik (Lab) |
| 25th | 2016 | | Lynn Ruane (Ind) | | David Norris (Ind) | | Ivana Bacik (Lab) |
| 26th | 2020 | | Lynn Ruane (Ind) | | David Norris (Ind) | | Ivana Bacik (Lab) |
| 26th | 2022 | | Lynn Ruane (Ind) | | David Norris (Ind) | | Tom Clonan (Ind) |
| 27th | 2025 | | Lynn Ruane (Ind) | | Aubrey McCarthy (Ind) | | Tom Clonan (Ind) |
Note: The columns in this table are used only for presentational purposes, and no significance should be attached to the order of columns.

## Elections

From 1832 (when registers of electors were first prepared) a turnout figure is given, for the percentage of the registered electors who voted. If the number of registered electors eligible to take part in a contested election is unknown, then the last known electorate figure is used to calculate an estimated turnout. If the numbers of registered electors and electors taking part in the poll are known, an exact turnout figure is calculated. In two member bloc vote elections (in which an elector could cast one or two votes as he chose), where the exact number of electors participating is unknown, an estimated turnout figure is given. This is calculated by dividing the total number of votes cast by two. To the extent that electors used only one of their votes the estimated turnout figure is an underestimate.

### Elections in the 2020s
#### 2025 election

2025 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| | Independent | Lynn Ruane | 21.1 | 3,761 | 3,769 | 3,781 | 3,792 | 3,803 | 3,900 | 3,974 | 4,042 | 4,102 | 4,399 | 4,806 | | | | |
| | Independent | Tom Clonan | 19.5 | 3,473 | 3,482 | 3,492 | 3,503 | 3,534 | 3,578 | 3,626 | 3,743 | 3,931 | 4,090 | 4,269 | 4,346 | 4,938 | | |
| | Independent | Aubrey McCarthy | 10.2 | 1,814 | 1,818 | 1,823 | 1,839 | 1,874 | 1,896 | 1,926 | 1,996 | 2,115 | 2,205 | 2,314 | 2,343 | 2,630 | 2,747 | 3,770 |
| | Independent | Hugo MacNeill | 9.5 | 1,684 | 1,687 | 1,696 | 1,721 | 1,757 | 1,764 | 1,792 | 1,870 | 1,957 | 2,057 | 2,116 | 2,141 | 2,359 | 2,476 | |
| | Green | Hazel Chu | 8.1 | 1,450 | 1,453 | 1,462 | 1,471 | 1,480 | 1,515 | 1,573 | 1,627 | 1,649 | 1,803 | 2,062 | 2,201 | 2,962 | 3,163 | 3,706 |
| | Green | Ossian Smyth | 7.8 | 1,380 | 1,382 | 1,385 | 1,393 | 1,401 | 1,419 | 1,439 | 1,509 | 1,524 | 1,641 | 1,945 | 2,029 | | | |
| | Labour | Sadhbh O'Neill | 6.1 | 1,085 | 1,086 | 1,088 | 1,095 | 1,106 | 1,161 | 1,196 | 1,249 | 1,305 | 1,384 | | | | | |
| | Independent | Katherine Zappone | 5.3 | 950 | 951 | 955 | 956 | 959 | 970 | 1,001 | 1,018 | 1,039 | | | | | | |
| | Independent | Laoise De Brún | 3.3 | 593 | 595 | 598 | 604 | 616 | 621 | 640 | 668 | | | | | | | |
| | Independent | Kevin Byrne | 2.8 | 495 | 500 | 516 | 528 | 557 | 564 | 582 | | | | | | | | |
| | Independent | Ade Oluborode | 1.9 | 339 | 343 | 349 | 363 | 365 | 372 | | | | | | | | | |
| | Social Democrats | Paul Mulville | 1.7 | 305 | 306 | 309 | 314 | 319 | | | | | | | | | | |
| | Independent | Marcus Matthews | 1.0 | 186 | 188 | 189 | 198 | | | | | | | | | | | |
| | Independent | Jack Mulcahy | 0.8 | 140 | 144 | 145 | | | | | | | | | | | | |
| | Independent | Derek Byrne | 0.5 | 87 | 90 | | | | | | | | | | | | | |
| | Independent | Abbas Ali O'Shea | 0.3 | 55 | | | | | | | | | | | | | | |
| Electorate: 70,000 Valid: 17,797 Spoilt: 24 Quota: 4,450 Turnout: 17,821 (25.5%) |||||||||||||||||||
* 1 2 3 4 Indication of party membership. No party labels appeared on the ballot.

#### 2022 by-election

2022 Seanad by-election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| | Independent | Hugo MacNeill | 15.4% | 2,068 | 2,071 | 2,075 | 2,085 | 2,092 | 2,102 | 2,121 | 2,153 | 2,250 | 2,290 | 2,312 | 2,391 | 2,624 | 2,863 | | |
| | Independent | Tom Clonan | 14.5% | 1,947 | 1,952 | 1,976 | 1,990 | 2,014 | 2,040 | 2,077 | 2,137 | 2,243 | 2,332 | 2,436 | 2,637 | 2,973 | 3,359 | 4,200 | 5,358 |
| | Independent | Maureen Gaffney | 14.0% | 1,882 | 1,884 | 1,892 | 1,913 | 1,936 | 1,972 | 1,993 | 2,066 | 2,121 | 2,190 | 2,274 | 2,438 | 2,641 | 3,083 | 3,908 | 5,198 |
| | Green Party | Hazel Chu | 13.2% | 1,766 | 1,770 | 1,785 | 1,802 | 1,823 | 1,842 | 1,858 | 1,918 | 1,955 | 2,090 | 2,272 | 2,583 | 2,743 | 3,300 | 3,683 | |
| | Labour Party | Ursula Quill | 8.6% | 1,156 | 1,159 | 1,178 | 1,205 | 1,226 | 1,246 | 1,290 | 1,325 | 1,368 | 1,430 | 1,525 | 1,773 | 1,890 | | | |
| | Independent | Aubrey McCarthy | 7.1% | 947 | 950 | 954 | 962 | 977 | 997 | 1,012 | 1,033 | 1,115 | 1,139 | 1,187 | 1,281 | | | | |
| | Independent | Sadhbh O'Neill | 6.5% | 870 | 873 | 879 | 896 | 909 | 931 | 940 | 991 | 1,030 | 1,105 | 1,186 | | | | | |
| | Social Democrats | Catherine Stocker | 3.9% | 521 | 521 | 530 | 541 | 548 | 563 | 576 | 600 | 608 | 657 | | | | | | |
| | Independent | Ade Oluborode | 3.5% | 471 | 479 | 488 | 500 | 508 | 528 | 548 | 576 | 586 | | | | | | | |
| | Independent | Ray Bassett | 3.4% | 458 | 458 | 458 | 463 | 475 | 480 | 497 | 544 | | | | | | | | |
| | Independent | Patricia McKenna | 3.1% | 421 | 421 | 427 | 434 | 440 | 454 | 463 | | | | | | | | | |
| | Independent | Paula Roseingrave | 1.5% | 200 | 200 | 202 | 209 | 220 | | | | | | | | | | | |
| | Labour Party | Eoin Barry | 1.4% | 189 | 192 | 199 | 199 | | | | | | | | | | | | |
| | Independent | Ryan Alberto Ó Giobúin | 1.4% | 182 | 183 | 195 | 202 | 222 | 230 | | | | | | | | | | |
| | Independent | Gisèle Scanlon | 1.3% | 170 | 170 | 174 | | | | | | | | | | | | | |
| | Independent | Michael McDermott | 1.0% | 132 | 134 | | | | | | | | | | | | | | |
| | Independent | Abbas Ali O'Shea | 0.3% | 38 | | | | | | | | | | | | | | | |
| Electorate: 67,788 Valid: 13,418 Spoilt: 16 Quota: 6,710 Turnout: 13,434 (19.8%) ||||||||||||||||||||
* 1 2 3 4 Indication of party membership. No party labels appeared on the ballot.

#### 2020 election

2020 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| | Independent | David Norris | 24.2 | 3,646 | 3,671 | 3,728 | 3,768 | | | | |
| | Labour | Ivana Bacik | 23.2 | 3,489 | 3,521 | 3,542 | 3,571 | 3,574 | 3,963 | | |
| | Independent | Lynn Ruane | 18.4 | 2,780 | 2,805 | 2,825 | 2,870 | 2,871 | 3,229 | 3,348 | 4,072 |
| | Independent | Hugo MacNeill | 13.5 | 2,038 | 2,050 | 2,081 | 2,133 | 2,133 | 2,299 | 2,342 | 2,961 |
| | Independent | Tom Clonan | 9.3 | 1,394 | 1,417 | 1,440 | 1,492 | 1,493 | 1,682 | 1,722 | |
| | Green | William Priestley | 7.2 | 1,090 | 1,104 | 1,119 | 1,175 | 1,177 | | | |
| | Independent | Keith Scanlon | 1.8 | 276 | 285 | 297 | | | | | |
| | Independent | Joseph O'Gorman | 1.2 | 180 | 183 | | | | | | |
| | Independent | Abbas Ali O'Shea | 0.5 | 81 | | | | | | | |
| | Independent | Derek Byrne | 0.4 | 67 | | | | | | | |
| Electorate: Approx. 65,000 Valid: 15,041 Spoilt: 12 Quota: 3,761 Turnout: Approx. 23.1% ||||||||||||

### Elections in the 2010s
#### 2016 election

2016 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| | Independent | David Norris | 25.3 | 4,070 | | | | | | | | | | | | | | |
| | Labour | Ivana Bacik | 17.8 | 2,853 | 2,871 | 2,887 | 2,904 | 2,936 | 2,956 | 3,043 | 3,113 | 3,197 | 3,306 | 3,482 | 3,758 | 4,144 | | |
| | Independent | Lynn Ruane | 8.6 | 1,378 | 1,381 | 1,399 | 1,418 | 1,434 | 1,471 | 1,524 | 1,563 | 1,646 | 1,793 | 1,903 | 2,128 | 2,480 | 2,511 | 3,343 |
| | Independent | Averil Power | 8.4 | 1,356 | 1,363 | 1,380 | 1,388 | 1,400 | 1,414 | 1,465 | 1,527 | 1,582 | 1,644 | 1,741 | 1,853 | 2,135 | 2,176 | |
| | Independent | Sean Barrett | 8.2 | 1,317 | 1,326 | 1,333 | 1,353 | 1,362 | 1,386 | 1,443 | 1,570 | 1,683 | 1,766 | 1,972 | 2,097 | 2,502 | 2,557 | 3,228 |
| | Independent | Tom Clonan | 7.0 | 1,131 | 1,133 | 1,147 | 1,153 | 1,157 | 1,172 | 1,233 | 1,280 | 1,364 | 1,458 | 1,590 | 1,742 | | | |
| | Independent | Oisín Coghlan | 4.3 | 683 | 685 | 690 | 696 | 720 | 743 | 778 | 796 | 847 | 945 | 1,017 | | | | |
| | Independent | Anthony Staines | 4.1 | 665 | 668 | 674 | 684 | 689 | 707 | 742 | 788 | 852 | 904 | | | | | |
| | Green | William Priestley | 3.4 | 548 | 550 | 561 | 574 | 598 | 634 | 661 | 689 | 737 | | | | | | |
| | Independent | Ethna Tinney | 3.2 | 516 | 518 | 528 | 534 | 538 | 553 | 594 | 631 | | | | | | | |
| | Independent | Sean Melly | 2.8 | 450 | 451 | 452 | 465 | 471 | 497 | 513 | | | | | | | | |
| | Independent | Sabina Brennan | 2.8 | 445 | 447 | 457 | 466 | 470 | 484 | | | | | | | | | |
| | Independent | Kevin Cunningham | 1.4 | 232 | 233 | 246 | 255 | 259 | | | | | | | | | | |
| | Independent | Eoin Meehan | 0.9 | 143 | 143 | 145 | | | | | | | | | | | | |
| | Independent | Edward Davitt | 0.9 | 142 | 142 | 147 | 151 | | | | | | | | | | | |
| | Independent | Maeve Cox | 0.8 | 135 | 136 | | | | | | | | | | | | | |
| Electorate: 57,732 Valid: 16,064 Spoilt: 43 Quota: 4,017 Turnout: 16,107 (27.9%) |||||||||||||||||||

#### 2011 election

In 2011 Karin Dubsky, who was listed on the printed ballot papers, discovered after their distribution that she was not an Irish citizen and thus ineligible, and advised electors not to vote for her. The returning officer ruled that ballots giving her a first preference would be excluded, but ballots giving her a lower preference would be transferred to the next lower preference when relevant.
2011 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| | Independent | David Norris | 36.1 | 5,623 | | | | | | | | | | | | | | | | | |
| | Labour | Ivana Bacik | 19.2 | 2,982 | 3,685 | 3,685 | 3,693 | 3,701 | 3,728 | 3,781 | 3,833 | 3,889 | 3,940 | | | | | | | | |
| | Independent | Tony Williams | 8.6 | 1,336 | 1,493 | 1,494 | 1,501 | 1,504 | 1,522 | 1,527 | 1,539 | 1,558 | 1,601 | 1,605 | 1,642 | 1,677 | 1,730 | 1,805 | 1,869 | 2,098 | 2,480 |
| | Independent | Sean Barrett | 6.8 | 1,051 | 1,248 | 1,256 | 1,263 | 1,273 | 1,293 | 1,314 | 1,340 | 1,356 | 1,383 | 1,391 | 1,444 | 1,493 | 1,622 | 1,823 | 1,952 | 2,450 | 3,065 |
| | Independent | Maurice Gueret | 5.3 | 822 | 936 | 938 | 946 | 950 | 958 | 969 | 984 | 1,005 | 1,024 | 1,030 | 1,077 | 1,149 | 1,230 | 1,333 | 1,534 | 1,803 | |
| | Independent | Rosaleen McDonagh | 2.9 | 446 | 511 | 511 | 513 | 522 | 522 | 528 | 544 | 559 | 576 | 584 | 622 | 762 | 837 | 909 | | | |
| | Independent | Fiona O'Malley | 2.8 | 441 | 590 | 550 | 550 | 554 | 562 | 570 | 596 | 619 | 632 | 637 | 660 | 685 | 752 | | | | |
| | Independent | Robin Hannan | 2.6 | 406 | 443 | 443 | 443 | 447 | 450 | 455 | 468 | 480 | 495 | 498 | 529 | | | | | | |
| | Independent | Iggy McGovern | 2.6 | 397 | 441 | 443 | 445 | 451 | 457 | 491 | 496 | 505 | 526 | 531 | 566 | 626 | | | | | |
| | Independent | William Priestley | 1.7 | 258 | 302 | 304 | 308 | 310 | 319 | 334 | 348 | 371 | 380 | 382 | | | | | | | |
| | Independent | Jeff Dudgeon | 1.3 | 205 | 236 | 237 | 237 | 241 | 242 | 245 | 252 | 258 | | | | | | | | | |
| | Independent | David Martin | 1.3 | 194 | 221 | 221 | 221 | 223 | 226 | 233 | 241 | | | | | | | | | | |
| | Independent | Dermot Frost | 1.1 | 178 | 199 | 199 | 203 | 207 | 208 | | | | | | | | | | | | |
| | Independent | Maeve Cox | 1.1 | 174 | 213 | 214 | 215 | 217 | 225 | 233 | | | | | | | | | | | |
| | Independent | Graham Quinn | 0.8 | 131 | 142 | 143 | 147 | 147 | | | | | | | | | | | | | |
| | Independent | Bart Connolly | 0.4 | 72 | 80 | 80 | 80 | | | | | | | | | | | | | | |
| | Independent | Dermot Sheehan | 0.3 | 49 | 54 | 55 | | | | | | | | | | | | | | | |
| | Independent | Francis Donnelly | 0.1 | 20 | 27 | | | | | | | | | | | | | | | | |
| Electorate: 53,583 Valid: 15,557 Spoilt: 257 Quota: 3,890 Turnout: 29.5% ||||||||||||||||||||||
* ↑ Francis Donnelly unofficially withdrew from the race to concentrate on the Labour Panel in which he was also running. His name remained on the ballot paper.

### Elections in the 2000s
#### 2007 election

2007 Seanad election: Dublin University :
| Party | Candidate | FPv% | % | Seat | Count |
| Independent | Shane Ross | 5,379 | 31.8 | 1 | 1 |
| Independent | David Norris | 5,240 | 31.0 | 2 | 1 |
| Independent | Ivana Bacik | 2,794 | 16.5 | 3 | 8 |
| Independent | Maurice Gueret | 1,155 | 6.8 | | |
| Independent | Rosaleen McDonagh | 684 | 4.0 | | |
| Independent | Seán O'Connor | 514 | 3.0 | | |
| Independent | David Hutchinson Edgar | 330 | 2.0 | | |
| Independent | Shay Conway | 214 | 1.7 | | |
| Independent | David Martin | 223 | 1.3 | | |
| Independent | Ike Efobi | 201 | 1.2 | | |
| Independent | Stephen Douglas | 183 | 1.1 | | |

#### 2002 election

2002 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat | Count |
| | Independent | David Norris | 3,493 | 24.5 | 1 | 5 |
| | Independent | Shane Ross | 3,465 | 24.3 | 2 | 5 |
| | Independent | Mary Henry | 2,123 | 14.9 | 3 | 10 |
| | Independent | Ivana Bacik | 1,591 | 11.2 | | |
| | Independent | Sean Barrett | 994 | 7.0 | | |
| | Independent | Maurice Gueret | 780 | 5.5 | | |
| | Independent | Rosaleen McDonagh | 733 | 5.2 | | |
| | Independent | P.J. O'Meara | 265 | 1.9 | | |
| | Independent | David Martin | 212 | 1.5 | | |
| | Independent | Prabu Kulkarni | 185 | 1.3 | | |
| | Independent | Gerard McHugh | 156 | 1.1 | | |
| | Independent | Anthony O'Donnell | 142 | 1.0 | | |
| | Independent | Declan Boland | 98 | 0.7 | | |
| Electorate: 38,488 Valid: 14,237 Quota: 3,560 Turnout: 37.0% |||||||

### Elections in the 1990s
#### 1997 election

1997 Seanad election: Dublin University :
| Party | Candidate | FPv% | % | Seat | Count |
| Independent | David Norris | 4,866 | 36.4 | 1 | 1 |
| Independent | Shane Ross | 2,475 | 18.5 | 3 | 6 |
| Independent | Mary Henry | 2,410 | 18.0 | 2 | 5 |
| Independent | Sean Barrett | 1,491 | 11.2 | | |
| Independent | Ivana Bacik | 885 | 6.6 | | |
| Independent | Henry Mountcharles | 461 | 3.5 | | |
| Independent | David Martin | 345 | 2.6 | | |
| Independent | Prabhu Kulkarni | 218 | 1.6 | | |
| Independent | Brian Caul | 149 | 1.1 | | |
| Independent | Nigel Hutson | 74 | 0.6 | | |

#### 1993 election

1993 Seanad election: Dublin University :
| Party | Candidate | FPv% | % | Seat | Count |
| Independent | David Norris | 3,569 | 31.1 | 1 | 1 |
| Independent | Shane Ross | 2,672 | 23.3 | 2 | 4 |
| Independent | Mary Henry | 1,980 | 17.3 | 3 | 10 |
| Independent | James Rickard | 1,006 | 8.8 | | |
| Independent | Claire Wheeler | 505 | 4.4 | | |
| Independent | Alan Stanford | 360 | 3.1 | | |
| Independent | Virginia Hogan | 291 | 2.5 | | |
| Independent | David Martin | 257 | 2.2 | | |
| Independent | John Dillon | 251 | 2.2 | | |
| Independent | Erick Dillon | 225 | 2.0 | | |
| Independent | Prabhu Kulkarni | 129 | 1.1 | | |
| Independent | Frederick O'Connell | 118 | 1.0 | | |
| Independent | Florence O'Donoghue | 81 | 0.7 | | |
| Independent | Peter Cooke | 28 | 0.2 | | |

### Elections in the 1980s
#### 1989 election

1989 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 |
| | Independent | Shane Ross | 26.8 | 2,443 | | | | | |
| | Independent | David Norris | 26.6 | 2,420 | | | | | |
| | Independent | Carmencita Hederman | 17.9 | 1,627 | 1,689 | 1,754 | 1,791 | 1,888 | 2,456 |
| | Independent | Mary Henry | 12.4 | 1,130 | 1,199 | 1,231 | 1,272 | 1,336 | 1,781 |
| | Independent | J. Rickard | 6.2 | 567 | 573 | 591 | 655 | 745 | |
| | Independent | B. Harvey | 4.4 | 407 | 425 | 436 | 462 | 522 | |
| | Independent | P. F. O'Brien | 3.5 | 319 | 325 | 333 | 357 | | |
| | Independent | P. Smyth | 2.1 | 188 | 194 | 204 | | | |
| Electorate: 18,245 Valid: 9,101 Spoilt: 7 Quota: 2,276 Turnout: 49.88% ||||||||||

#### 1987 election

1987 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 |
| | Independent | Shane Ross | 25.5 | 2,180 | |
| | Independent | Mary Robinson | 24.8 | 2,123 | 2,221 |
| | Independent | David Norris | 24.6 | 2,101 | 2,260 |
| | Independent | Catherine McGuinness | 13.7 | 1,170 | 1,232 |
| | Independent | B. O'Rafferty | 6.6 | 562 | 620 |
| | Independent | Ferdinand von Prondzynski | 2.6 | 224 | |
| | Independent | W. J. McCormack | 2.2 | 188 | |
| Electorate: 14,737 Valid: 8,548 Spoilt: 16 Quota: 2,138 Turnout: 58.00% ||||||

#### 1983 election

1983 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 |
| | Independent | Shane Ross | 23.0 | 1,560 | 1,574 | 1,654 | 1,771 | | |
| | Independent | Mary Robinson | 22.2 | 1,506 | 1,547 | 1,681 | 2,194 | | |
| | Independent | Trevor West | 17.1 | 1,144 | 1,178 | 1,283 | 1,399 | 1,527 | 1,565 |
| | Independent | Catherine McGuinness | 15.1 | 1,026 | 1,052 | 1,151 | 1,314 | 1,593 | 1,631 |
| | Independent | David Norris | 12.5 | 850 | 876 | 957 | | | |
| | Independent | David Cabot | 7.2 | 488 | 534 | | | | |
| | Independent | R.A. Kennedy | 2.3 | 159 | | | | | |
| | Independent | William Fitzsimon | 0.7 | 45 | | | | | |
| Electorate: 10,293 Valid: 6,778 Spoilt: 63 Quota: 1,695 Turnout: 66.46% ||||||||||

#### 1982 election

1982 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| | Independent | Shane Ross | 23.9 | 1,412 | 1,423 | 1,430 | 1,462 | 1,548 | | |
| | Independent | Mary Robinson | 20.6 | 1,212 | 1,220 | 1,282 | 1,461 | 1,634 | | |
| | Independent | Trevor West | 20.1 | 1,185 | 1,193 | 1,209 | 1,263 | 1,390 | 1,443 | 1,490 |
| | Independent | Catherine McGuinness | 17.3 | 1,023 | 1,032 | 1,062 | 1,141 | 1,272 | 1,378 | 1,404 |
| | Independent | David Cabot | 7.4 | 437 | 446 | 472 | 535 | | | |
| | Independent | David Norris | 6.6 | 392 | 396 | 429 | | | | |
| | Independent | B. Cullen | 2.8 | 167 | 180 | | | | | |
| | Independent | William Fitzsimon | 1.2 | 69 | | | | | | |
| Electorate: 9,164 Valid: 5,897 Spoilt: 58 Quota: 1,475 Turnout: 64.34% |||||||||||

#### 1981 election

1981 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 |
| | Independent | Shane Ross | 24.6 | 1,415 | 1,422 | 1,431 | 1,475 | | |
| | Independent | Mary Robinson | 19.1 | 1,097 | 1,103 | 1,152 | 1,207 | 1,387 | 1,583 |
| | Independent | Catherine McGuinness | 19.1 | 1,096 | 1,103 | 1,122 | 1,158 | 1,229 | 1,428 |
| | Independent | Trevor West | 15.0 | 863 | 869 | 891 | 926 | 985 | 1,183 |
| | Independent | David Cabot | 8.6 | 492 | 502 | 528 | 554 | 663 | |
| | Independent | David Norris | 6.2 | 360 | 366 | 389 | 410 | | |
| | Independent | Thomas Murtagh | 3.5 | 203 | 205 | 223 | | | |
| | Independent | B. Cullen | 2.7 | 159 | 173 | | | | |
| | Independent | William Fitzsimon | 0.8 | 40 | | | | | |
| | Independent | O. Quinn | 0.4 | 20 | | | | | |
| Electorate: 9,262 Valid: 5,745 Spoilt: 90 Quota: 1,437 Turnout: 62.03% ||||||||||

### Elections in the 1970s
#### 1979 by-election

Following the resignation of Conor Cruise O'Brien on 13 June 1979.
1979 Seanad by-election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 |
| | Independent | Catherine McGuinness | 35.1 | 1,841 | 2,175 | 2,790 |
| | Independent | Shane Ross | 31.0 | 1,625 | 1,777 | 2,270 |
| | Independent | Thomas Murtagh | 19.7 | 1,033 | 1,225 | |
| | Independent | David Norris | 12.6 | 659 | | |
| | Independent | O. Quinn | 1.7 | 88 | | |
| Electorate: 8,686 Valid: 5,246 Spoilt: 103 Quota: 2,624 Turnout: 61.58% |||||||

#### 1973 election

1973 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 | 4 | 5 | 6 |
| | Independent | Mary Robinson | 30.3 | 1,472 | | | | | |
| | Independent | Noël Browne | 19.5 | 944 | 1,019 | 1,064 | 1,137 | 1,415 | |
| | Independent | William J. E. Jessop | 15.4 | 747 | 781 | 804 | 853 | 1,033 | 1,117 |
| | Independent | Trevor West | 14.3 | 695 | 758 | 780 | 837 | 1,098 | 1,216 |
| | Independent | D.J. McConnell | 7.5 | 365 | 396 | 414 | 436 | | |
| | Independent | David Cabot | 5.4 | 263 | 314 | 360 | | | |
| | Independent | L. Fleming | 4.3 | 211 | 226 | 251 | | | |
| | Independent | D. Waldron-Lynch | 1.3 | 64 | 68 | | | | |
| | Independent | J. Revington | 1.2 | 57 | 60 | | | | |
| | Independent | N. O'Byrne Healy | 0.7 | 33 | 37 | | | | |
| Electorate: 7,047 Valid: 4,851 Spoilt: 80 Quota: 1,213 Turnout: 69.97% ||||||||||

### Elections in the 1960s
#### 1960 by-election

Following the death of William Fearon on 27 December 1959.
1960 Seanad by-election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 |
| | Independent | William J. E. Jessop | 49.9 | 1,736 | 1,828 |
| | Independent | John N. Ross | 36.8 | 1,281 | 1,343 |
| | Independent | C. Lloyd | 7.8 | 271 | 298 |
| | Independent | Eoin O'Mahony | 5.5 | 192 | |
| Valid: 3,480 Quota: 1,741 ||||||

### Elections in the 1940s
#### 1944 election

1944 Seanad election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat | Count |
| | Independent | T. C. Kingsmill Moore | 755 | 32.9 | 1 | 1 |
| | Independent | William Fearon | 621 | 27.0 | 2 | 1 |
| | Independent | Joseph Johnston | 437 | 19.0 | 3 | 4 |
| | Independent | Robert Rowlette | 419 | 18.2 | | |
| | Independent | Eoin O'Mahony | 65 | 2.8 | | |
| Electorate: 3,886 Valid: 2,297 Quota: 575 Turnout: 59.1% |||||||

### Elections in the 1930s
#### 1933 by-election

Held on 13 October 1933, following the death of independent TD Sir James Craig.
1933 by-election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat | Count |
| | Independent | Robert Rowlette | Unopposed | N/A | 1 | |
| Electorate: 3,260 Valid: Quota: Turnout: |||||||

#### 1933 election

1933 general election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat |
| | Independent | Ernest Alton | Unopposed | N/A | 1 |
| | Independent | James Craig | Unopposed | N/A | 2 |
| | Independent | William Thrift | Unopposed | N/A | 3 |
| Electorate: 3,260 Valid: Quota: Turnout: |||||||

#### 1932 election

1932 general election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat |
| | Independent | Ernest Alton | Unopposed | N/A | 1 |
| | Independent | James Craig | Unopposed | N/A | 2 |
| | Independent | William Thrift | Unopposed | N/A | 3 |
| Electorate: 3,182 Valid: Quota: Turnout: |||||||

### Elections in the 1920s
#### September 1927 election

September 1927 general election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat |
| | Independent | Ernest Alton | Unopposed | N/A | 1 |
| | Independent | James Craig | Unopposed | N/A | 2 |
| | Independent | William Thrift | Unopposed | N/A | 3 |
| Electorate: 2,084 Valid: Quota: Turnout: |||||||

#### June 1927 election

June 1927 general election: Dublin University :
| Party | Party | Candidate | FPv% | Count | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 | 3 |
| | Independent | William Thrift | 38.6 | 614 | | |
| | Independent | James Craig | 22.4 | 356 | 415 | |
| | Independent | Bolton C. Waller | 20.9 | 332 | 388 | 393 |
| | Independent | Ernest Alton | 18.1 | 287 | 388 | 400 |
| Electorate: 2,084 Valid: 1,589 Quota: 398 Turnout: 76.3% |||||||

#### 1923 election

1923 general election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat |
| | Independent | Ernest Alton | Unopposed | N/A | 1 |
| | Independent | James Craig | Unopposed | N/A | 2 |
| | Independent | William Thrift | Unopposed | N/A | 3 |
| Electorate: 1,400 Valid: Quota: Turnout: |||||||

#### 1922 election

1922 general election: Dublin University :
| Party | Party | Candidate | FPv% | % | Seat |
| | Independent | Ernest Alton | Unopposed | N/A | 1 |
| | Independent | James Craig | Unopposed | N/A | 2 |
| | Independent | Gerald Fitzgibbon | Unopposed | N/A | 3 |
| | Independent | William Thrift | Unopposed | N/A | 4 |
| Electorate: 1,150 Valid: Quota: Turnout: |||||||

#### 1921 election

1921 general election: Dublin University :
| Party | Candidate | FPv% | % | Seat |
| Ind. Unionist | Ernest Alton | Unopposed | N/A | 1 |
| Ind. Unionist | James Craig | Unopposed | N/A | 2 |
| Ind. Unionist | Gerald Fitzgibbon | Unopposed | N/A | 3 |
| Ind. Unionist | William Thrift | Unopposed | N/A | 4 |

### Elections in the 1910s

1919 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | William Jellett | Unopposed | Unopposed | Unopposed |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
* Caused by Samuels' appointment to the High Court of Justice in Ireland.
    This was the last UK Parliament election held in the 26 counties which became the Irish Free State.
1918 general election: Dublin University (2 seats) :
| Party | Party | Candidate | FPv% | Count | Count |
| Party | Party | Candidate | FPv% | 1 | 2 |
| | Irish Unionist | Arthur Samuels | 43.1 | 1,273 | |
| | Ind. Unionist | Robert Woods | 26.8 | 793 | 1,094 |
| | Irish Unionist | William Jellett | 21.4 | 631 | ≤875 |
| | Ind. Nationalist | Stephen Gwynn | 8.7 | 257 | eliminated |
| Electorate: 4,541 Valid: 2,954 Quota: 985 Turnout: 59.4% ||||||
    Note: The Times edition of 23 December 1918 reported that the Provost of the University, as returning officer, did not announce the figures. It was ascertained that Woods had 1,094 votes when elected. The above is the best reconstruction of the later counts which is possible with the available information.
October 1917 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | Arthur Samuels | Unopposed | Unopposed | Unopposed |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
* Caused by Samuels' appointment as Solicitor-General for Ireland.
February 1917 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | Arthur Samuels | 1,841 | 73.06 | N/A |
| | Irish Unionist | Robert Woods | 679 | 26.94 | N/A |
| Majority | Majority | Majority | 1,162 | 46.12 | N/A |
| Turnout | Turnout | Turnout | 2,520 | 60.9 | N/A |
| Registered electors | Registered electors | Registered electors | 4,138 | | |
| | Irish Unionist hold | Irish Unionist hold | Swing | N/A | |
* Caused by Campbell's appointment as Lord Chief Justice of Ireland.
1916 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | James Campbell | Unopposed | Unopposed | Unopposed |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
* Caused by Campbell's appointment as Attorney-General for Ireland.
December 1910 general election: Dublin University (2 seats) :
| Party | Candidate | Votes | % | ±% |
| Irish Unionist | Edward Carson | Unopposed | Unopposed | Unopposed |
| Irish Unionist | James Campbell | Unopposed | Unopposed | Unopposed |
| Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
| Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
January 1910 general election: Dublin University (2 seats) :
| Party | Candidate | Votes | % | ±% |
| Irish Unionist | Edward Carson | Unopposed | Unopposed | Unopposed |
| Irish Unionist | James Campbell | Unopposed | Unopposed | Unopposed |
| Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
| Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |

### Elections in the 1900s

1906 general election: Dublin University (2 seats) :
| Party | Candidate | Votes | % | ±% |
| Irish Unionist | Edward Carson | Unopposed | Unopposed | Unopposed |
| Irish Unionist | James Campbell | Unopposed | Unopposed | Unopposed |
| Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
| Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
1903 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | James Campbell | 1,492 | 51.2 | N/A |
| | Irish Unionist | Arthur Samuels | 1,421 | 48.8 | N/A |
| Majority | Majority | Majority | 71 | 2.4 | N/A |
| Turnout | Turnout | Turnout | 2,913 | 64.0 | N/A |
| Registered electors | Registered electors | Registered electors | 4,553 | | |
| | Irish Unionist gain from Liberal Unionist | Irish Unionist gain from Liberal Unionist | Swing | N/A | |
* Caused by Lecky's resignation.
1900 general election: Dublin University (2 seats) :
| Party | Candidate | Votes | % | ±% |
| Irish Unionist | Edward Carson | Unopposed | Unopposed | Unopposed |
| Liberal Unionist | W. E. H. Lecky | Unopposed | Unopposed | Unopposed |
| Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
| Liberal Unionist hold | Liberal Unionist hold | Liberal Unionist hold | Liberal Unionist hold | Liberal Unionist hold |
1900 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | Edward Carson | Unopposed | Unopposed | Unopposed |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
* Caused by Carson's appointment as Solicitor General for England and Wales.

### Elections in the 1890s

1895 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Liberal Unionist | W. E. H. Lecky | 1,757 | 63.5 | New |
| | Irish Unionist | George Wright | 1,011 | 36.5 | N/A |
| Majority | Majority | Majority | 746 | 27.0 | N/A |
| Turnout | Turnout | Turnout | 2,768 | 61.4 | N/A |
| Registered electors | Registered electors | Registered electors | 4,506 | | |
| | Liberal Unionist gain from Irish Unionist | Liberal Unionist gain from Irish Unionist | Swing | N/A | |
* Caused by Plunket's succession to the peerage, becoming Baron Rathmore.
1895 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | David Plunket | Unopposed | Unopposed | Unopposed |
| | Irish Unionist | Edward Carson | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 4,506 | | |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
1892 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | David Plunket | 2,188 | 46.6 | −2.1 |
| | Irish Unionist | Edward Carson | 1,609 | 34.3 | N/A |
| | Irish Unionist | James Corry Jones Lowry | 897 | 19.1 | N/A |
| Majority | Majority | Majority | 712 | 15.2 | −31.7 |
| Turnout | Turnout | Turnout | 2,347 (est) | 53.9 (est) | +7.8 |
| Registered electors | Registered electors | Registered electors | 4,352 | | |
| | Irish Unionist hold | Irish Unionist hold | Swing | N/A | |
| | Irish Unionist hold | Irish Unionist hold | Swing | N/A | |

### Elections in the 1880s

1888 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | Dodgson Madden | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 4,094 | | |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
* Caused by Madden's appointment as Solicitor-General for Ireland.
1887 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | Dodgson Madden | 1,376 | 65.9 | N/A |
| | Irish Unionist | Richard Clare Parsons | 712 | 34.1 | N/A |
| Majority | Majority | Majority | 664 | 31.8 | N/A |
| Turnout | Turnout | Turnout | 2,088 | 51.0 | N/A |
| Registered electors | Registered electors | Registered electors | 4,092 | | |
| | Irish Unionist hold | Irish Unionist hold | Swing | N/A | |
* Caused by Holmes' appointment as a judge.
1886 by-election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | David Plunket | Unopposed | Unopposed | Unopposed |
| | Irish Unionist | Hugh Holmes | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 4,155 | | |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
| | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold | Irish Unionist hold |
* Caused by Plunket's appointment as First Commissioner of Works, and Holmes' appointment as Attorney-General for Ireland.
1886 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Unionist | David Plunket | 1,865 | 48.7 | N/A |
| | Irish Unionist | Hugh Holmes | 1,855 | 48.4 | N/A |
| | Irish Parliamentary | Hugh Herbert Johnston | 56 | 1.5 | New |
| | Irish Parliamentary | Edward Patrick Sarsfield Counsell | 55 | 1.4 | New |
| Majority | Majority | Majority | 1,799 | 46.9 | N/A |
| Turnout | Turnout | Turnout | 1,916 (est) | 46.1 (est) | N/A |
| Registered electors | Registered electors | Registered electors | 4,155 | | |
| | Irish Unionist hold | Irish Unionist hold | Swing | N/A | |
| | Irish Unionist hold | Irish Unionist hold | Swing | N/A | |
1885 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | David Plunket | Unopposed | Unopposed | Unopposed |
| | Irish Conservative | Hugh Holmes | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 4,155 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1885 by-election: Dublin University (2 seats) :
| Party | Candidate | Votes | % | ±% |
| Irish Conservative | David Plunket | Unopposed | Unopposed | Unopposed |
| Irish Conservative | Hugh Holmes | Unopposed | Unopposed | Unopposed |
| Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Plunket's appointment as First Commissioner of Works, and Gibson's appointment as Lord Chancellor of Ireland, becoming Baron Ashbourne.
1880 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | David Plunket | Unopposed | Unopposed | Unopposed |
| | Irish Conservative | Edward Gibson | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,539 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |

### Elections in the 1870s

1877 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Edward Gibson | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 3,393 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Gibson's appointment as Solicitor-General for Ireland.
February 1875 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | David Plunket | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,438 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Plunket's appointment as Solicitor-General for Ireland.
January 1875 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Edward Gibson | 1,210 | 48.3 | N/A |
| | Irish Conservative | Alexander Edward Miller | 759 | 30.3 | N/A |
| | Irish Conservative | Anthony Traill | 538 | 21.5 | N/A |
| Majority | Majority | Majority | 451 | 18.0 | N/A |
| Turnout | Turnout | Turnout | 2,507 | 102.8 | N/A |
| Registered electors | Registered electors | Registered electors | 2,438 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* ↑ Walker recorded the vote tally as above, but the electorate he also included was a lower number – at 2,438 – and so this result may be inaccurate.
* Caused by Ball's appointment as Lord Chancellor of Ireland.
1874 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | John Ball | Unopposed | Unopposed | Unopposed |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Ball's appointment as Solicitor-General for Ireland.
1874 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | David Plunket | Unopposed | Unopposed | Unopposed |
| | Irish Conservative | John Ball | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1870 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | David Plunket | Unopposed | Unopposed | Unopposed |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Lefroy's resignation.

### Elections in the 1860s

1868 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Anthony Lefroy | 1,156 | 36.2 | −1.2 |
| | Irish Conservative | John Ball | 1,077 | 33.7 | +14.3 |
| | Irish Conservative | Edward Grogan | 743 | 23.3 | −20.0 |
| | Liberal | Thomas Ebenezer Webb | 216 | 6.8 | New |
| Majority | Majority | Majority | 334 | 10.4 | −7.6 |
| Turnout | Turnout | Turnout | 1,704 (est) | 79.2 (est) | −3.1 |
| Registered electors | Registered electors | Registered electors | 2,151 | | |
| | Irish Conservative hold | Irish Conservative hold | Swing | N/A | |
| | Irish Conservative hold | Irish Conservative hold | Swing | N/A | |
August 1867 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Robert Warren | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Chatterton's appointment as Vice-Chancellor of Ireland.
March 1867 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Hedges Chatterton | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Chatterton's appointment as Attorney-General for Ireland.
February 1867 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Hedges Chatterton | Unopposed | Unopposed | Unopposed |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Walsh's appointment as Master of the Rolls in Ireland
1866 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | John Walsh | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Whiteside's appointment as Lord Chief Justice of Ireland
1865 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | James Whiteside | 1,210 | 43.3 | N/A |
| | Irish Conservative | Anthony Lefroy | 1,045 | 37.4 | N/A |
| | Independent | John Ball | 542 | 19.4 | New |
| Majority | Majority | Majority | 503 | 18.0 | N/A |
| Turnout | Turnout | Turnout | 1,399 (est) | 82.3 (est) | N/A |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Swing | N/A | |
| | Irish Conservative hold | Irish Conservative hold | Swing | N/A | |

### Elections in the 1850s

1859 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Anthony Lefroy | Unopposed | Unopposed | Unopposed |
| | Irish Conservative | James Whiteside | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1859 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | James Whiteside | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Hamilton's resignation.
1858 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Anthony Lefroy | 589 | 62.7 | N/A |
| | Irish Conservative | Arthur Edward Gayer | 350 | 37.2 | N/A |
| Majority | Majority | Majority | 239 | 25.5 | N/A |
| Turnout | Turnout | Turnout | 939 | 55.2 | N/A |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Napier's appointment as Lord Chancellor of Ireland.
1857 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Joseph Napier | 829 | 41.3 | N/A |
| | Irish Conservative | George Hamilton | 791 | 39.4 | N/A |
| | Whig | James Anthony Lawson | 272 | 13.5 | New |
| | Whig | John Wilson | 116 | 5.8 | New |
| Majority | Majority | Majority | 519 | 25.9 | N/A |
| Turnout | Turnout | Turnout | 1,004 (est) | 59.1 (est) | N/A |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1852 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Joseph Napier | Unopposed | Unopposed | Unopposed |
| | Irish Conservative | George Hamilton | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 1,700 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1852 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Joseph Napier | Unopposed | Unopposed | Unopposed |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Napier's appointment as Attorney-General for Ireland.

### Elections in the 1840s

1848 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Joseph Napier | Unopposed | Unopposed | Unopposed |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Shaw's resignation.
1847 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | George Hamilton | 738 | 33.1 | N/A |
| | Irish Conservative | Frederick Shaw | 572 | 25.6 | N/A |
| | Irish Conservative | Joseph Napier | 540 | 24.5 | N/A |
| | Whig | James MacCullagh | 374 | 16.8 | New |
| Majority | Majority | Majority | 32 | 1.1 | N/A |
| Turnout | Turnout | Turnout | 1,190 | 56.7 | N/A |
| Registered electors | Registered electors | Registered electors | 2,100 | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1843 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | George Hamilton | Unopposed | Unopposed | Unopposed |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Jackson's appointment as Justice of the Court of Common Pleas in Ireland.
1842 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Joseph Jackson | Unopposed | Unopposed | Unopposed |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
* Caused by Lefroy's appointment as Baron of the Court of Exchequer in Ireland.
1841 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Irish Conservative | Frederick Shaw | Unopposed | Unopposed | Unopposed |
| | Irish Conservative | Thomas Lefroy | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |

### Elections in the 1830s

1837 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % |
| | Irish Conservative | Frederick Shaw | 852 | 45.4 |
| | Irish Conservative | Thomas Lefroy | 839 | 44.7 |
| | Whig | Joseph Stock | 186 | 9.9 |
| Majority | Majority | Majority | 653 | 34.8 |
| Turnout | Turnout | Turnout | 940 | 44.8 |
| Registered electors | Registered electors | Registered electors | 2,100 | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1835 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % |
| | Irish Conservative | Thomas Lefroy | Unopposed | Unopposed |
| | Irish Conservative | Frederick Shaw | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | 2,074 | |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
| | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold | Irish Conservative hold |
1832 general election: Dublin University (2 seats) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | Thomas Langlois Lefroy | 1,304 | 38.3 | +10.8 |
| | Tory | Frederick Shaw | 1,290 | 37.9 | +10.4 |
| | Whig | Philip Cecil Crampton | 423 | 12.4 | −10.1 |
| | Whig | George Ponsonby | 390 | 11.4 | −11.1 |
| Majority | Majority | Majority | 867 | 25.4 | +15.4 |
| Turnout | Turnout | Turnout | 1,724 | 83.8 | −3.2 |
| Registered electors | Registered electors | Registered electors | 2,058 | | |
| | Tory hold | Tory hold | Swing | +10.7 | |
| | Tory win (new seat) | Tory win (new seat) | Tory win (new seat) | Tory win (new seat) | Tory win (new seat) |
* The constituency gained a second seat at the 1832 general election under the Representation of the People (Ireland) Act 1832.
1831 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | Thomas Langlois Lefroy | 44 | 55.0 | +11.6 |
| | Whig | Philip Cecil Crampton | 36 | 45.0 | New |
| Majority | Majority | Majority | 8 | 10.0 | +6.1 |
| Turnout | Turnout | Turnout | 80 | 87.0 | +7.8 |
| Registered electors | Registered electors | Registered electors | 92 | | |
| | Tory hold | Tory hold | Swing | +11.6 | |
1830 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % |
| | Tory | Thomas Langlois Lefroy | 33 | 43.4 |
| | Tory | John Wilson Croker | 30 | 39.5 |
| | Tory | John Henry North | 13 | 17.1 |
| Majority | Majority | Majority | 3 | 3.9 |
| Turnout | Turnout | Turnout | 76 | 79.2 |
| Registered electors | Registered electors | Registered electors | 96 | |
| | Tory hold | Tory hold | Tory hold | Tory hold |

### Elections in the 1820s

1827 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | John Wilson Croker | 38 | 42.7 | New |
| | Tory | John Henry North | 29 | 32.6 | New |
| | Tory | Thomas Langlois Lefroy | 22 | 24.7 | New |
| Majority | Majority | Majority | 9 | 10.1 | N/A |
| Registered electors | Registered electors | Registered electors | | | |
| | Tory gain from Whig | Tory gain from Whig | Swing | N/A | |
* Caused by Plunket's succession to the peerage, becoming Baron Plunket.
1826 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | William Plunket | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
1822 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | William Plunket | Unopposed | Unopposed | Unopposed |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
* Caused by Plunket's appointment as Attorney-General for Ireland.
1820 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | William Plunket | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |

### Elections in the 1810s

1818 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | William Plunket | 34 | 53.1 | N/A |
| | Tory | John Wilson Croker | 30 | 46.9 | New |
| Majority | Majority | Majority | 4 | 6.2 | N/A |
| Registered electors | Registered electors | Registered electors | | | |
| | Whig hold | Whig hold | Whig hold | Whig hold | Whig hold |
1812 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Whig | William Plunket | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Whig gain from Tory | Whig gain from Tory | Whig gain from Tory | Whig gain from Tory | Whig gain from Tory |

### Elections in the 1800s

1807 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | John Leslie Foster | 46 | 92.0 | N/A |
| | Whig | Thomas Thornton Macklin | 4 | 8.0 | New |
| Majority | Majority | Majority | 42 | 84.0 | +79.4 |
| Registered electors | Registered electors | Registered electors | | | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
1806 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | George Knox | 35 | 52.3 | N/A |
| | Tory | John Leslie Foster | 32 | 47.7 | N/A |
| Majority | Majority | Majority | 3 | 4.6 | −10.0 |
| Registered electors | Registered electors | Registered electors | | | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
1805 by-election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | George Knox | Unopposed | Unopposed | Unopposed |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
* Caused by Knox's appointment as a Lord Commissioner of the Treasury.
1802 general election: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | George Knox | 39 | 57.3 | N/A |
| | Whig | William Plunket | 29 | 42.7 | New |
| Majority | Majority | Majority | 10 | 14.6 | N/A |
| Registered electors | Registered electors | Registered electors | | | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
1801 co-option: Dublin University (1 seat) :
| Party | Party | Candidate | Votes | % | ±% |
| | Tory | George Knox | Unopposed | Unopposed | Unopposed |
| Registered electors | Registered electors | Registered electors | | | |
| | Tory hold | Tory hold | Tory hold | Tory hold | Tory hold |
* The constituency had two seats in the Irish House of Commons. This was reduced to one seat for the 1801 co-option. Lots were drawn to determine which of the two MPs, George Knox and Arthur Browne, would get the seat.