Elections in Colorado
Federal government Presidential elections 1876 1880 1884 1888 1892 1896 1900 1904 1908 1912 1916 1920 1924 1928 1932 1936 1940 1944 1948 1952 1956 1960 1964 1968 1972 1976 1980 1984 1988 1992 1996 2000 2004 2008 2012 2016 2020 2024 Presidential caucuses and primaries Democratic 2000 2008 2012 2016 2020 2024 Republican 2008 2012 2016 2020 2024 U.S. Senate elections 1876 1879 1883 sp 1885 1889 1891 1895 1897 1901 1903 1907 1909 1913 1913 sp 1914 1918 1920 1924 1924 sp 1926 1930 1932 1932 sp 1936 1938 1942 1942 sp 1944 1948 1950 1954 1956 1960 1962 1966 1968 1972 1974 1978 1980 1984 1986 1990 1992 1996 1998 2002 2004 2008 2010 2014 2016 2020 2022 2026 2028 U.S. House of Representatives elections 1876 1878 1880 1882 1884 1886 1888 1890 1892 1894 1896 1898 1900 1902 1904 1906 1908 1910 1912 1914 1916 1918 1920 1922 1924 1926 1927 1st sp 1928 1930 1932 1934 1936 1938 1940 3rd sp 1941 4th sp 1942 1944 1st sp 1946 1948 1950 1952 1954 1956 1958 1960 1962 1964 1966 1968 1970 1972 1974 1976 1978 1980 1982 1983 6th sp 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006 2008 2010 2012 2014 2016 2018 2020 2022 2024 4th sp
State government General elections 2010 2014 2018 2020 2022 Gubernatorial elections 1876 1878 1880 1882 1884 1886 1888 1890 1894 1896 1898 1900 1902 1904 1906 1908 1910 1912 1914 1916 1918 1920 1922 1924 1926 1928 1930 1932 1934 1936 1938 1940 1942 1944 1946 1948 1950 1952 1954 1956 1958 1962 1966 1970 1974 1978 1982 1986 1990 1994 1998 2002 2006 2010 2014 2018 2022 2026 Secretary of State elections 2022 2026 Attorney General elections 2014 2018 2022 2026 Treasurer elections 2022 Colorado State Board of Regent elections 2016 Senate elections 2013 (recall) 2014 2016 2018 2020 2022 2024 House of Representatives elections 2018 2020 2022 2024
Ballot measures List of Colorado ballot measures 1893 2 1972 8 1974 1 1982 1 1992 2 2000 20 2004 36 2006 38 41 42 43 44 E F G H I J K 2008 46 47 48 49 50 51 52 54 58 59 L 2010 62 2012 64 2018 A 2020 B C EE 113 114 2022 125 126 FF 2023 HH II 2024 79 80 I J 127 128 129 131
Colorado Springs Local elections 2019 Mayoral elections 1995 1997 sp 1999 2003 2007 2011 2015 2019 2023
Denver Mayoral elections 2003 2007 2011 2015 2019 2023
El Paso County Local elections 2018
Pueblo Mayoral elections 2023–24

2024 Colorado Amendment J is an amendment to the Colorado Constitution that appeared on the general election ballot on November 5, 2024, in Colorado. As it passed, the amendment repealed Amendment 43, a 2006 constitutional ban on same-sex marriage in the Constitution of Colorado. While Constitutional ballot measures typically require a 55% vote to pass in Colorado, Amendment J only needed a simple majority. This is because the 55% vote threshold only applies to proposed amendments adding to the Constitution, not those which repeal provisions from it.^[2]

In 2006, Colorado voters passed Amendment 43 which defined marriage as a union between one man and one woman within the State of Colorado. Same-sex marriage was illegal in Colorado prior to this, with the ballot measure simply moving the state's ban on same-sex marriage from state statue to the state Constitution. Following a 2014 decision by the Colorado Supreme Court, Attorney General John Suthers declared that County Clerks within the state could not deny couples marriage licenses on the basis of sex.^[3] On June 26, 2015, the US Supreme Court ruled in the case Obergefell v. Hodges which struck down same-sex marriage bans nationwide. This made the text of Amendment 43 legally unenforceable. Following the 2022 decision in Dobbs v. Jackson Women's Health Organization however, some groups in favor of same-sex marriage pushed to repeal Amendment 43 out of concern that the Obergefell v. Hodges decision could be overturned by the US Supreme Court as well.^[4]

On April 19, 2024, Senator Joann Ginal and Representatives Alex Valdez and Brianna Titone introduced Senate Concurrent Resolution 24–003 to the Colorado General Assembly to refer the issue of the Constitutionality same-sex marriage to voters. The bill passed the Colorado Senate on a vote of 29 in favor to 5 opposed. All 23 Senate Democrats as well as 6 Republicans voted in favor, with all 5 no votes coming from Republicans. The bill then passed the Colorado House of Representatives with all Democrats voting in favor other than Regina English and all Republicans voting against other than Matt Soper and Rick Taggart.^[5] The bill was signed into law by Governor Jared Polis on May 8, 2024, resulting in the amendment appearing on the November 2024 ballot. The amendment was passed by voters, removing language from the Colorado Constitution stating that marriage is exclusively between a man and a woman.^[6]

The amendment appeared on the ballot as follows:^[7]

Shall there be an amendment to the Colorado constitution removing the ban on same-sex marriage?

The campaign in favor of Amendment J was led by the organization Freedom to Marry Colorado.^[8] Additionally, the official state voter guide offered the argument that marriage is a basic right for all Coloradans and the Colorado Constitution should protect that right regardless of one's sexuality, particularly if the right to same-sex marriage is overturned by the US Supreme Court.

There was no major organized opposition to Amendment J. However, the official state voter guide offered as an argument that marriage should be between one man and one woman and if Obergefell v. Hodges is overturned, the Colorado Constitution should reflect that.

On November 5, 2024, at 7:00 PM MT, polls in Colorado closed. Amendment J required a simple majority to pass. On the same night, at 8:50 PM MT, the Associated Press projected, with 63.6% in favor, the passage of Proposition 3.^[12] After all votes were tabulated, the Amendment passed with 64.3% in favor.

Amendment J

Choice	Votes	%
Yes	1,982,200	64.33
No	1,099,228	35.67
Total votes	3,081,428	100.00

• 2006 Colorado Amendment 43
• Same-sex marriage in Colorado
• 2024 California Proposition 3
• 2024 Hawaii Amendment 1