Party and ideology
% of U.S. adults who favor same-sex marriage, by political party and ideology (2001-2019)
| Year | Cons Rep/Ln Rep | Mod-Lib Rep/Ln Rep | Cons-Mod Dem/Ln Dem | Lib Dem/Ln Dem |
|---|---|---|---|---|
| 2001 | 15% | 37% | 39% | 59% |
| 2003 | 16% | 38% | 38% | 63% |
| 2004 | 12% | 28% | 33% | 66% |
| 2005 | 10% | 36% | 36% | 73% |
| 2006 | 11% | 33% | 37% | 69% |
| 2007 | 12% | 35% | 41% | 71% |
| 2008 | 15% | 37% | 42% | 74% |
| 2009 | 14% | 36% | 43% | 70% |
| 2010 | 17% | 44% | 46% | 72% |
| 2011 | 24% | 49% | 50% | 72% |
| 2012 | 20% | 48% | 55% | 79% |
| 2013 | 24% | 49% | 53% | 79% |
| 2014 | 25% | 56% | 58% | 82% |
| 2015 | 25% | 60% | 59% | 84% |
| 2016 | 25% | 60% | 61% | 84% |
| 2017 | 39% | 63% | 66% | 90% |
| 2019 | 36% | 59% | 64% | 88% |
PEW RESEARCH CENTER
