With Tamaulipas’ legislature coming on board, same-sex marriage is now legal across all of Mexico.
The northern border state on Wednesday amended the state’s Civil Code, setting off cheers of “Yes, we can!” from supporters of the change.
The vote follows victories for marriage equality advocates in Tabasco and Guerrero.
Mexico City became the country’s first area to legalize same-sex marriage in 2009.
“The whole country shines with a huge rainbow. Live the dignity and rights of all people. Love is love,” said the president of the Supreme Court of Justice of the Nation, Arturo Zaldívar.
In 2015, the high court declared state laws preventing same-sex marriage unconstitutional, but some more conservative states — including Yucatán — resisted for several years.
Same-sex marriage remains illegal or not recognized in Paraguay, Bolivia, Peru, Venezuela, most of Central America and swaths of the Caribbean.
But in September, Cuban voters overwhelmingly approved a sweeping “family law” that would allow same-sex couples to marry and adopt.