TrackerLast Updated: 3 Jul 2026
SF20.9%-0.5FG18.3%+0.5FF16.0%+0.1SD11.0%+0.3Lab3.6%-0.2GP3.1%+0.1Aon5.9%-0.1II6.8%-0.1PBP-S2.7%-0.3Ind11.7%+0.4SF20.9%-0.5FG18.3%+0.5FF16.0%+0.1SD11.0%+0.3Lab3.6%-0.2GP3.1%+0.1Aon5.9%-0.1II6.8%-0.1PBP-S2.7%-0.3Ind11.7%+0.4
SF20.9%-0.5FG18.3%+0.5FF16.0%+0.1SD11.0%+0.3Lab3.6%-0.2GP3.1%+0.1Aon5.9%-0.1II6.8%-0.1PBP-S2.7%-0.3Ind11.7%+0.4SF20.9%-0.5FG18.3%+0.5FF16.0%+0.1SD11.0%+0.3Lab3.6%-0.2GP3.1%+0.1Aon5.9%-0.1II6.8%-0.1PBP-S2.7%-0.3Ind11.7%+0.4

Irish Constitutional Referendums

Every referendum held under the 1937 Constitution — 43 in total, from EEC entry to the 2024 family and care amendments

Total Referendums43
Passed31
Rejected12
Closest Result50.3%15th Amendment

Turnout over time

Referendum turnout has ranged from under 29% (1979, 1996) to over 75% (the founding 1937 vote). EU treaty and social-issue votes typically draw far higher turnout than routine institutional ones.

Founding1 Jul 1937
Draft Constitution
Adoption of the Constitution
Passed

Approved the current Constitution of Ireland (Bunreacht na hÉireann) itself, replacing the 1922 Free State Constitution.

56.5% YesTurnout 75.8%43.5% No
Electoral & Institutional17 Jun 1959
3rd Amendment Bill (1959)
Replace PR-STV with first-past-the-post
Rejected

Éamon de Valera's proposal to scrap proportional representation for the British-style first-past-the-post system — narrowly rejected.

48.2% YesTurnout 58.4%51.8% No
Electoral & Institutional16 Oct 1968
3rd & 4th Amendment Bills (1968)
Electoral system change and boundary rule
Rejected

A second attempt to abolish PR-STV, alongside a separate proposal on constituency boundary rules — both rejected by a wider margin than 1959.

39.2% YesTurnout 65.8%60.8% No
Europe & International10 May 1972
3rd Amendment
Join the European Communities
Passed

Approved Ireland's accession to the EEC (now the EU) — one of the largest Yes margins in the state's history.

83.1% YesTurnout 70.9%16.9% No
Electoral & Institutional7 Dec 1972
4th Amendment
Lower the voting age to 18
Passed

Reduced the minimum voting age from 21 to 18.

84.6% YesTurnout 50.7%15.4% No
Rights & Family7 Dec 1972
5th Amendment
Remove the churches' special constitutional recognition
Passed

Deleted Article 44's recognition of the Catholic Church's 'special position' and named minority religions, moving toward a more secular constitution.

84.4% YesTurnout 50.7%15.6% No
Rights & Family5 Jul 1979
6th Amendment
Allow the Adoption Board's legal status
Passed

A technical amendment placing the adoption process on firmer constitutional footing, passed almost unanimously on a low turnout.

99.0% YesTurnout 28.6%1.0% No
Electoral & Institutional5 Jul 1979
7th Amendment
Widen Seanad university seats
Passed

Allowed the Oireachtas to extend Seanad university seats beyond Trinity College and the NUI — never fully legislated for since.

92.4% YesTurnout 28.6%7.6% No
Rights & Family7 Sep 1983
8th Amendment
Equal right to life of the unborn
Passed

Inserted a constitutional ban on abortion, recognising the equal right to life of the unborn — repealed 35 years later in 2018.

66.9% YesTurnout 53.7%33.1% No
Electoral & Institutional14 Jun 1984
9th Amendment
Allow non-citizen voting rights by law
Passed

Enabled the Oireachtas to extend Dáil voting rights to non-citizens resident in the state, later used for some local and EU elections.

75.4% YesTurnout 47.5%24.6% No
Rights & Family26 Jun 1986
10th Amendment Bill (1986)
Remove the constitutional ban on divorce
Rejected

The first attempt to legalise divorce was heavily defeated, nine years before it eventually passed in 1995.

36.5% YesTurnout 60.8%63.5% No
Europe & International26 May 1987
10th Amendment
Ratify the Single European Act
Passed

Approved the EEC's Single European Act, deepening the single market.

69.9% YesTurnout 44.1%30.1% No
Europe & International18 Jun 1992
11th Amendment
Ratify the Maastricht Treaty
Passed

Approved the treaty that established the European Union and set out the path to the euro.

69.1% YesTurnout 57.3%30.9% No
Rights & Family25 Nov 1992
12th Amendment Bill (1992)
Exclude suicide risk as grounds for abortion
Rejected

Sought to narrow the 1992 Supreme Court "X Case" ruling by excluding risk of suicide as a grounds for lawful abortion — rejected.

34.6% YesTurnout 68.2%65.4% No
Rights & Family25 Nov 1992
13th Amendment
Right to travel abroad for abortion
Passed

Guaranteed the right to travel to another country to access abortion, directly responding to the 1992 'X Case'.

62.4% YesTurnout 68.2%37.6% No
Rights & Family25 Nov 1992
14th Amendment
Right to information about abortion services abroad
Passed

Guaranteed the right to distribute and access information about abortion services lawfully available in other countries.

59.9% YesTurnout 68.1%40.1% No
Rights & Family24 Nov 1995
15th Amendment
Legalise divorce
Passed

Removed the constitutional ban on divorce by the narrowest margin of any passed referendum — under 10,000 votes nationally.

50.3% YesTurnout 62.2%49.7% No
Electoral & Institutional28 Nov 1996
16th Amendment
Allow courts to refuse bail for likely reoffenders
Passed

Allowed judges to refuse bail where there was a real risk the accused would commit a serious offence while awaiting trial.

74.8% YesTurnout 29.2%25.2% No
Electoral & Institutional30 Oct 1997
17th Amendment
Qualify cabinet confidentiality
Passed

Allowed courts, tribunals and other bodies to require disclosure of government discussions in defined circumstances.

52.6% YesTurnout 47.2%47.4% No
Europe & International22 May 1998
18th Amendment
Ratify the Treaty of Amsterdam
Passed

Approved the EU treaty that expanded EU competences ahead of enlargement.

61.7% YesTurnout 56.2%38.3% No
Peace & The North22 May 1998
19th Amendment
Good Friday Agreement — amend Articles 2 and 3
Passed

Gave effect to the Good Friday Agreement, dropping the state's territorial claim over Northern Ireland in favour of an aspiration to unity by consent.

94.4% YesTurnout 56.3%5.6% No
Electoral & Institutional11 Jun 1999
20th Amendment
Constitutional recognition of local government
Passed

Gave local government explicit constitutional status and guaranteed local elections at least every five years.

77.8% YesTurnout 51.1%22.2% No
Rights & Family7 Jun 2001
21st Amendment
Abolish the death penalty
Passed

Removed all remaining constitutional provision for capital punishment, which had already been abolished in ordinary law since 1990.

62.1% YesTurnout 34.8%37.9% No
Europe & International7 Jun 2001
23rd Amendment
Ratify the Rome Statute of the International Criminal Court
Passed

Allowed the state to ratify the treaty establishing the International Criminal Court.

64.2% YesTurnout 34.8%35.8% No
Europe & International7 Jun 2001
24th Amendment Bill (2001)
Ratify the Treaty of Nice
Rejected

The first Nice Treaty referendum was rejected on the lowest turnout of any EU treaty vote — held the same day as two other, successful, referendums.

46.1% YesTurnout 34.8%53.9% No
Rights & Family6 Mar 2002
25th Amendment Bill (2002)
Exclude suicide risk as grounds for abortion
Rejected

A second attempt to legislate against abortion on suicide-risk grounds, defeated by under 1 percentage point.

49.6% YesTurnout 42.9%50.4% No
Europe & International19 Oct 2002
26th Amendment
Ratify the Treaty of Nice
Passed

The re-run Nice Treaty referendum passed comfortably on higher turnout, clearing the way for EU enlargement.

62.9% YesTurnout 49.5%37.1% No
Rights & Family11 Jun 2004
27th Amendment
Restrict automatic citizenship by birth
Passed

Ended automatic citizenship for children born in Ireland to non-citizen parents, ending Ireland's unconditional jus soli citizenship rule.

79.2% YesTurnout 59.9%20.8% No
Europe & International12 Jun 2008
28th Amendment Bill (2008)
Ratify the Treaty of Lisbon
Rejected

The Lisbon Treaty was rejected on its first attempt, echoing the 2001 Nice pattern.

46.6% YesTurnout 53.1%53.4% No
Europe & International2 Oct 2009
28th Amendment
Ratify the Treaty of Lisbon
Passed

Passed comfortably after the government secured legal guarantees on taxation, neutrality and abortion policy.

67.1% YesTurnout 58.0%32.9% No
Electoral & Institutional27 Oct 2011
29th Amendment
Allow reduction of judges' pay
Passed

Allowed judicial pay to be cut in line with other public servants during the financial crisis, without breaching judicial independence.

79.7% YesTurnout 55.9%20.3% No
Electoral & Institutional27 Oct 2011
30th Amendment Bill (2011)
Strengthen Oireachtas inquiry powers
Rejected

Would have let Oireachtas committees make findings of fact against named individuals — rejected amid concerns about fair-procedure rights.

46.7% YesTurnout 55.9%53.3% No
Europe & International31 May 2012
30th Amendment
Ratify the EU Fiscal Stability Treaty
Passed

Approved the euro-area Fiscal Compact, entrenching EU budget-deficit rules — took the amendment number the failed 2011 Oireachtas-inquiries bill had left free.

60.3% YesTurnout 50.6%39.7% No
Rights & Family10 Nov 2012
31st Amendment
Strengthen children's constitutional rights
Passed

Gave children explicit constitutional rights of their own, distinct from their parents', including in adoption and child-protection cases.

58.0% YesTurnout 33.5%42.0% No
Electoral & Institutional4 Oct 2013
32nd Amendment Bill (2013)
Abolish Seanad Éireann
Rejected

Enda Kenny's proposal to abolish the Seanad and move to a single-chamber Oireachtas was narrowly rejected.

48.3% YesTurnout 39.2%51.7% No
Electoral & Institutional4 Oct 2013
33rd Amendment
Establish a Court of Appeal
Passed

Created a new Court of Appeal between the High Court and Supreme Court to relieve a growing appeals backlog.

65.2% YesTurnout 39.2%34.8% No
Rights & Family22 May 2015
34th Amendment
Marriage equality for same-sex couples
Passed

Made Ireland the first country in the world to approve same-sex marriage by popular vote.

62.1% YesTurnout 60.5%37.9% No
Electoral & Institutional22 May 2015
35th Amendment Bill (2015)
Lower the presidential candidacy age to 21
Rejected

Proposed lowering the minimum age to run for President from 35 to 21 — rejected by the largest margin of any Irish referendum.

26.9% YesTurnout 60.5%73.1% No
Rights & Family25 May 2018
36th Amendment
Repeal the 8th Amendment (legalise abortion)
Passed

Removed the 1983 constitutional abortion ban, paving the way for the Health (Regulation of Termination of Pregnancy) Act 2018.

66.4% YesTurnout 64.1%33.6% No
Rights & Family26 Oct 2018
37th Amendment
Remove the offence of blasphemy
Passed

Deleted the constitutional reference to blasphemy as an offence, held alongside the 2018 presidential election.

64.9% YesTurnout 43.9%35.1% No
Rights & Family24 May 2019
38th Amendment
Ease the minimum separation period for divorce
Passed

Removed the constitution's fixed minimum separation period for divorce, leaving it to be set by ordinary law.

82.1% YesTurnout 50.9%17.9% No
Rights & Family8 Mar 2024
39th Amendment Bill (2024)
Broaden the constitutional definition of 'family'
Rejected

Would have extended constitutional recognition of "family" beyond marriage to include other "durable relationships" — decisively rejected.

32.3% YesTurnout 44.4%67.7% No
Rights & Family8 Mar 2024
40th Amendment Bill (2024)
Replace 'women in the home' with a general care clause
Rejected

Would have replaced Article 41.2's language about women's duties in the home with a gender-neutral clause on family carers — rejected by an even wider margin than the same day's family referendum.

26.1% YesTurnout 44.4%73.9% No

Pass rate by category

Share of referendums in each category that passed, 1937–2024.

How constitutional referendums work

The Constitution of Ireland can only be amended by referendum. A proposal must first pass as a bill in both the Dáil and Seanad, then be put to a simple majority vote of the people — there is no minimum turnout requirement. Amendment numbers are assigned in the order bills are enacted, not proposed, so a rejected bill's number is later reused by the next amendment that actually passes — which is why, for example, the "22nd Amendment" never existed as a enacted amendment.

Source: Electoral Commission of Ireland, "Referendum Results 1937–2024". Figures for the four referendums held jointly on the same date (7 Dec 1972; 25 Nov 1992; 7 Jun 2001; 22 May 1998 and 2015; 4 Oct 2013; 8 Mar 2024) share the same turnout, since one ballot box covered every question on the day.

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