Same-sex marriage in Argentina Same-sex marriage in Argentina Same-sex marriage in Argentina has been legal since July 22, 2010. Argentina was the first country in Latin America, the second in the Americas, and the second in the Southern Hemisphere to allow same-sex marriage nationwide. It was the tenth country worldwide to allow same-sex marriage. In the first decade of the 21st century, civil unions ( or "unión convivencial") were made legal in four jurisdictions in Argentina: the Autonomous City of Buenos Aires (2002), the province of Río Negro (2003), the city of Villa Carlos Paz (2007), and the city of Río Cuarto (2009). Civil
Same-sex marriage in Mexico Association (ILGA) and Amnesty International (AI). On 21 December 2009, Mexico City became the first Latin American jurisdiction to legalize same-sex marriage. The law became effective on 4 March 2010. On 5 August 2010, the Supreme Court voted 8-2 to uphold the constitutionality of Mexico City's same-sex marriage law. The Court later ruled on 10 August 2010, that Mexico City marriages are valid throughout the entire country. On 28 November 2011, the first two same-sex marriages occurred in Quintana Roo after discovering that Quintana Roo's Civil Code did not explicitly prohibit same-sex marriage, but these marriages were later annulled by