The newspaper El País reported on Monday that Mujica and Education and Culture Minister Ricardo Ehrlich signed the measure on May 3. It received final approval last month in the Uruguay House of Representatives.
Gays and lesbians can legally marry in neighboring Argentina and 10 other countries.
Mexico City; 13 Brazilian states that include São Paulo and Rio de Janeiro and Brasilia, the country’s capital, are among the Latin American jurisdictions in which same-sex couples can legally marry.
The Colombian Senate on April 24 overwhelmingly rejected a proposal that would have extended nuptials to gays and lesbians. Same-sex couples in Colombia can legally register their unions on June 20 if lawmakers fail to extend the same benefits heterosexuals receive through marriage to gays and lesbians as the country’s Constitutional Court mandated in 2011.
Uruguay’s same-sex marriage law takes effect on Aug. 1.