Soyinka had vowed to destroy his green card if Donald Trump won the presidential election.
“I have already done it, I have disengaged (from the United States). I have done what I said I would do,” the 82-year-old told AFP on the sidelines of an education conference at the University of Johannesburg.
“I had a horror of what is to come with Trump… I threw away the (green) card, and I have relocated, and I’m back to where I have always been” — meaning his homeland Nigeria.
The prolific playwright, novelist and poet won the Nobel Prize for Literature in 1986 and has been a regular teacher at US universities including Harvard, Cornell and Yale.
At the same time he said he would not discourage others from applying for a green card.
“It’s useful in many ways. I wouldn’t for one single moment discourage any Nigerians or anybody from acquiring a green card… but I have had enough of it,” he said.
Soyinka, one of Africa’s most famous writers and rights activists, was jailed in 1967 for 22 months during Nigeria’s civil war.
He was reported to have recently completed a term as scholar-in-residence at New York University’s Institute of African American Affairs.