Same-sex marriage

==Public opinion==
{{See also|Public opinion of same-sex marriage in the United States|Public opinion of same-sex marriage in Australia}}
[[File:Public Support of Same-Sex Marriage.svg|center|thumb|upright=3|Public opinion of same-sex marriage. Fraction in favor:<ref>For ease of comparison, only 'yes' and 'no' responses are counted. For old polling data, support figures have been adjusted upward @1%/year.</ref>
{{col-begin}}
{{col-break}}
{{legend|#58006e|5⁄6+}}
{{legend|#b000dc|2⁄3+}}
{{col-break}}
{{legend|#dd55ff|1⁄2+}}
{{legend|#f5cdff|1⁄3+}}
{{col-break}}
{{legend|#fcefff|1⁄6+}}
{{legend|#e0e0e0|<1⁄6}}
{{col-break}}
{{legend|#f0f0f0|no polls}}
{{col-end}}
]]

Numerous polls and studies on the issue have been conducted. A trend of increasing support for same-sex marriage has been revealed across many countries of the world, often driven in large part by a generational difference in support. Polling that was conducted in developed democracies in this century shows a majority of people in support of same-sex marriage. Support for same-sex marriage has increased across every age group, political ideology, religion, gender, race and region of various developed countries in the world.<ref name="Gallup2011">{{Cite web |last=Newport |first=Frank |date=20 May 2011 |title=For First Time, Majority of Americans Favor Legal Gay Marriage |url=http://www.gallup.com/poll/147662/First-Time-Majority-Americans-Favor-Legal-Gay-Marriage.aspx |url-status=live |archive-url=https://web.archive.org/web/20140729043935/http://www.gallup.com/poll/147662/First-Time-Majority-Americans-Favor-Legal-Gay-Marriage.aspx |archive-date=29 July 2014 |access-date=25 September 2012 |publisher=[[The Gallup Organization|Gallup]]}}</ref><ref>{{Cite web |title=Public Opinion: Nationally |url=http://www.australianmarriageequality.com/wp/who-supports-equality/a-majority-of-australians-support-marriage-equality |url-status=dead |archive-url=https://web.archive.org/web/20110303043929/http://www.australianmarriageequality.com/wp/who-supports-equality/a-majority-of-australians-support-marriage-equality/ |archive-date=3 March 2011 |access-date=25 September 2012 |publisher=australianmarriageequality.com}}</ref><ref>{{Cite web |title=Gay Life in Estonia |url=http://www.globalgayz.com/europe/estonia/gay-life-in-estonia |url-status=dead |archive-url=https://web.archive.org/web/20120716100828/http://www.globalgayz.com/europe/estonia/gay-life-in-estonia |archive-date=16 July 2012 |access-date=25 September 2012 |publisher=globalgayz.com}}</ref><ref>{{Cite news |last=Jowit |first=Juliette |date=12 June 2012 |title=Gay marriage gets ministerial approval |work=[[The Guardian]] |location=London |url=https://www.theguardian.com/society/2012/jun/12/gay-marriage-receive-ministerial-approval |url-status=live |access-date=25 September 2012 |archive-url=https://web.archive.org/web/20190506173542/https://www.theguardian.com/society/2012/jun/12/gay-marriage-receive-ministerial-approval |archive-date=6 May 2019}}</ref><ref>{{Cite news |date=24 February 2011 |title=Most Irish people support gay marriage, poll says |work=PinkNews |url=http://www.pinknews.co.uk/2011/02/24/most-irish-people-support-gay-marriage-poll-says |url-status=dead |access-date=25 September 2012 |archive-url=https://web.archive.org/web/20130926032112/http://www.pinknews.co.uk/2011/02/24/most-irish-people-support-gay-marriage-poll-says |archive-date=26 September 2013}}</ref>{{update inline|date=December 2021}}

Various detailed polls and studies on same-sex marriage that were conducted in several countries show that support for same-sex marriage significantly increases with higher levels of education and is also significantly stronger among younger generations, with a clear trend of continually increasing support.<ref name="Pew Survey 2023">{{cite web|url=https://www.pewresearch.org/short-reads/2023/06/13/how-people-in-24-countries-view-same-sex-marriage/|title=How people in 24 countries view same-sex marriage|access-date=12 December 2023}}</ref>

;Greater support with youth
[[Pew Research]] polling results from 32 countries found 21 with statistically higher support for same-sex marriage among those under 35 than among those over 35 in 2022–2023. Countries with the greatest absolute difference are placed to the left in the following chart. Countries without a significant generational difference are placed to the right.<ref name="Pew Survey 2023"/> 

<div style="overflow:auto">
{{ #invoke:Chart | bar-chart
| height = 400
| width = 1200
| stack = 1
| group 1 = 33 : 52 : 37 : 34 : 52 : 43 : 35 : 57 : 54 : 64 : 48 : 47 : 59 : 62 : 71 : 73 : 34 : 20 : 5 : 90 : 15 : 89 : 87 : 82 : 80 : 79 : 74 : 53 : 36 : 31 : 5 : 2
| group 2 = 42 : 29 : 28 : 27 : 26 : 24 : 24 : 22 : 22 : 20 : 19 : 17 : 15 : 13 : 11 : 8 : 8 : 7 : 7 : 6 : 5 : 0 : 0 : 0 : 0 : 0 : 0 : 0 : 0 : 0 : 0 : 0
| x legends = <small>Taiw</small> : <small>Mex</small> : <small>Sing</small> : <small>ROK</small> : <small>HK</small> : <small>Gre</small> : <small>Pol</small> : <small>Viet</small> : <small>Thai</small> : <small>Jap</small> : <small>Cam</small> :  <small>Braz</small> : <small>USA</small> : <small>Arg</small> : <small>Ital</small> : <small>Oz</small> : <small>S. Af.</small> : <small>Sri Lanka</small> : <small>Keny</small> : <small>Swed</small> : <small>Malay</small> : <small>Neth</small> : <small>Spa</small> : <small>Fran</small> : <small>Germ</small> : <small>Cana</small> : <small>UK</small> : <small>India</small> : <small>Isra</small> : <small>Hung</small> : <small>Indo</small> : <small>Nigeria</small>
| colors = navy : blue  
| group names = over 35 : additional support from those under 35
}}
</div>

A 2016 survey by the [[Varkey Foundation]] found similarly high support of same-sex marriage (63%) among 18–21-year-olds in an online survey of 18 countries around the world.<ref>{{Cite web |title=What the world's young people think and feel. |url=https://www.varkeyfoundation.org/media/4487/global-young-people-report-single-pages-new.pdf}}</ref><ref>{{Cite web |title=Who supports equal rights for same-sex couples? |url=https://aifs.gov.au/research/family-matters/no-100/who-supports-equal-rights-same-sex-couples}}</ref><ref>{{Cite web |date=Jun 2, 2015 |title=Age is decisive factor when it comes to supporting same-sex marriage: LAPOP |url=https://news.vanderbilt.edu/2015/06/02/age-is-decisive-factor-when-it-comes-to-supporting-same-sex-marriage-lapop/ |access-date=2023-12-26 |website=Vanderbilt University |language=en-US}}</ref>

{{ #invoke:Chart | bar-chart
| height = 300
| width = 800
| stack = 1
| group 1 = 82 : 81 : 77 : 77 : 74 : 74 : 73 : 73 : 71 : 59 : 54 : 54 : 53 : 53 : 50 : 47 : 33 : 16
| x legends = <small>Germ</small> : <small>Cana</small> : <small>Oz</small> : <small>UK</small> : <small>NZ</small> : <small>Fran</small> : <small>Ital</small> : <small>Arg</small> : <small>USA</small> : <small>Braz</small> : <small>Chin</small> :  <small>S. Af.</small> : <small>India</small> : <small>Jap</small> : <small>Isra</small> : <small>ROK</small> : <small>Turk</small> : <small>Nigeria</small>
| colors = navy  
| group names = 18&ndash;21 year-olds
}}

(The sampling error is approx. 4% for Nigeria and 3% for the other countries. Because of legal constraints, the question on same-sex marriage was not asked in the survey countries of Russia and Indonesia.)

{{Same-sex marriage opinion polls worldwide}}