Ecuador's Foreign Minister Maria Fernanda Espinosa said Thursday at a press conference in Quito that Assange had been made an Ecuadorian citizen on December 12.
AFP reported that Ecuador has requested Britain to recognise Assange as a diplomat which would give him immunity from arrest, a request which Britain has refused.
Julian Assange, faces rape and sexual assault allegations in Sweden.
Assange has always denied the sexual assault allegations against him, claiming the sex was consensual and that the case was politically motivated to get him extradited to the US over massive Wikileaks dumps of secret US military reports that year.
A United Nations panel had concluded in 2016 that Assange was under arbitrary detention. But the British government has maintained he must face justice in UK courts over his breach of bail conditions.
WikiLeaks is an international non-profit journalistic organisation that publishes secret information, news leaks and classified media from anonymous sources.